To overcome antimalarial drug resistance,carbohydrate derivatives as selective PfHT1 inhibitor have been suggested in recent experimental work with orthosteric and allosteric dual binding pockets.Inspired by this prom...To overcome antimalarial drug resistance,carbohydrate derivatives as selective PfHT1 inhibitor have been suggested in recent experimental work with orthosteric and allosteric dual binding pockets.Inspired by this promising therapeutic strategy,herein,molecular dynamics simulations are performed to investigate the molecular determinants of co-administra-tion on orthosteric and allosteric inhibitors targeting PfHT1.Our binding free energy analyses capture the essential trend of inhibitor binding affinity to protein from published experimental IC50 data in three sets of distinct characteristics.We rank the contribution of key residues as binding sites which categorized into three groups based on linker length,size of tail group,and sugar moiety of inhibitors.The pivotal roles of these key residues are further validated by mutant analysis where mutated to nonpolar alanine leading to reduced affinities to different degrees.The exception was fructose derivative,which exhibited a significant enhanced affinity to mutation on orthosteric sites due to strong changed binding poses.This study may provide useful information for optimized design of precision medicine to circumvent drug-resistant Plasmodium parasites with high efficacy.展开更多
While visualization plays a crucial role in high-energy physics(HEP)experiments,the existing detector description formats including Geant4,ROOT,GDML,and DD4hep face compatibility limitations with modern visualization ...While visualization plays a crucial role in high-energy physics(HEP)experiments,the existing detector description formats including Geant4,ROOT,GDML,and DD4hep face compatibility limitations with modern visualization platforms.This paper presents a universal interface that automatically converts these four kinds of detector descriptions into FBX,an industry standard 3D model format which can be seamlessly integrated into advanced visualization platforms like Unity.This method bridges the gap between HEP instrumental display frameworks and industrial-grade visualization ecosystems,enabling HEP experiments to harness rapid technological advancements.Furthermore,it lays the groundwork for the future development of additional HEP visualization applications,such as event display,virtual reality,and augmented reality.展开更多
Non-Hermitian topological insulators have attracted considerable attention due to their distinctive energy band characteristics and promising applications.Here,we systematically investigate non-Hermitian Möbius i...Non-Hermitian topological insulators have attracted considerable attention due to their distinctive energy band characteristics and promising applications.Here,we systematically investigate non-Hermitian Möbius insulators and graphene-like topological semimetals from the projected symmetry and realize their corresponding topological phenomena in an electric circuit-based framework.By introducing a nonreciprocal hopping term consisting of negative impedance converters into a two-dimensional electric circuit,we establish an experimental platform that effectively demonstrates that introducing non-Hermitian terms significantly enhances the energy localization of topological edge states,which originate from the non-Hermitian skin effect.Furthermore,a thorough comparison of experimental measurements with numerical simulations validates the robustness and reliability of our electric circuit structure.This work not only reveals the physical properties of non-Hermitian topological materials but also provides valuable theoretical and experimental guidance for the implementation of topological circuits and the design of radiofrequency devices in the future.展开更多
Engineering spin polarization in dissipative bosonic systems is crucial for advancing quantum technologies,especially for applications in quantum metrology and space-based quantum simulations.This work demonstrates pr...Engineering spin polarization in dissipative bosonic systems is crucial for advancing quantum technologies,especially for applications in quantum metrology and space-based quantum simulations.This work demonstrates precise magnetic moment control in multicomponent Bose gases during evaporative cooling via tailored magnetic fields.By adjusting the magnetic field gradients,null point position,and duration,we selectively tune evap-oration rates of magnetic sublevels,achieving targeted spin polarization.Theoretical models,validated by numerical simulations and Stern–Gerlach experiments,reveal how magnetic fields reshape trapping poten-tials and spin-dependent dissipation.The results establish a dissipative spin-selection mechanism governing polarization evolution in evapora-tively cooled Bose gases and provide a framework for engineering spin-polarized quantum states.展开更多
The discovery of superconductivity in infinite-layer nickelate films marks a groundbreaking addition to the family of unconventional superconductors,providing new insights into mechanism of unconventional high tempera...The discovery of superconductivity in infinite-layer nickelate films marks a groundbreaking addition to the family of unconventional superconductors,providing new insights into mechanism of unconventional high temperature superconductivity.However,synthesizing these superconducting nickelates presents significant challenges:they cannot be grown directly and instead require a two-step synthesis protocol involving initial deposition of a perovskite precursor phase(e.g.,Nd_(0.8)Sr_(0.2)NiO_(3))followed by topotactic reduction to the infinite-layer structure(Nd_(0.8)Sr_(0.2)NiO_(2)).This process is further complicated by the extreme sensitivity of both steps to synthesis conditions,necessitating stringent control over the crystallinity and stoichiometry of the parent phase.In this study,we uncover nickel deficiency during pulsed laser deposition(PLD)of the parent-phase Nd_(0.8)Sr_(0.2)NiO_(3).By incorporating 15% excess nickel into the PLD target,we mitigate this loss,suppress secondary phase formation in the Nd_(0.8)Sr_(0.2)NiO_(3) parent film,and ultimately obtain a phase-pure Nd_(0.8)Sr_(0.2)NiO_(2) film exhibiting superconductivity after following reduction.Notably,we observe a doping-dependent insulator-to-superconductor transition in films synthesized from targets with varying nickel content after reduction.X-ray photoelectron spectroscopy(XPS)confirms that the Nd/Ni ratio in films derived from nickel-over-doped targets(15% excess)aligns closely with the ideal stoichiometry.These findings underscore the indispensable role of stoichiometric precision in stabilizing infinite-layer nickelates and establish a practical synthesis strategy for optimizing their superconducting performance.展开更多
Topological systems with hybrid topology offer unique opportunities for exploring multiplexing topological phenomena and valuable applications.However,building a hybrid topological superconductor and achieving a contr...Topological systems with hybrid topology offer unique opportunities for exploring multiplexing topological phenomena and valuable applications.However,building a hybrid topological superconductor and achieving a controllable topological phase transition between different orders of topo-logical superconductors remain a challenge.We propose a solution to unify both first-and higher-order topological superconductors on a square lattice,incorporating the Rashba spin–orbit coupling,Zeeman field and s-wave superconducting pairing.By utilizing one-dimensional normal edge states,we construct a boundary-obstructed topological superconductor associated with closing the boundary energy gap.This leads to the emer-gence of Majorana corner modes,whose topological properties are charac-terized by the Berry phase.By tuning the amplitude of different intracell hoppings,we can control the localization of Majorana corner modes.We also generalize the Majorana polarization as a topological invariant to verify the existence of Majorana corner modes.Remarkably,the obtained phase diagram is well consistent with that described by the boundary energy gap,a quantized Berry phase and Chern number.With the further increase of Zeeman field,we observe a transition from a second-to first-order topological superconducting phase by closing the bulk gap.Its topol-ogy is protected by the bulk states and characterized by nonzero Chern number.Additionally,no Majorana corner modes are present and the topological boundary states are determined by nonzero Chern number in the region where both the quantized Berry phase and Chern number are nonzero.Furthermore,we achieve the hinge Majorana zero modes in a three-dimensional structure by stacking the two-dimensional square lattices.Our work unveils the physical mechanism to get a topological superconductor with different orders,and opens an avenue to characterize and detect different order topological superconductors on two-dimensional lattices.展开更多
We consider the generation of Schrodinger cat states using a quantum measurement-induced logical gate where entanglement between the input state of the target oscillator and the Fock state of the ancillary system prod...We consider the generation of Schrodinger cat states using a quantum measurement-induced logical gate where entanglement between the input state of the target oscillator and the Fock state of the ancillary system produced by the quantum non-demolition entangling C_(Z) operation is combined with the homodyne measurement.We utilize the semiclassical approach to construct both the input-output mapping of the field variables in the phase space and the wave function of the output state.This approach is found to predict that the state at the gate output can be represented by a minimally disturbed cat-like state which is a superposition of two copies of the initial state symmetrically displaced by momentum variable.For the target oscillator prepared in the coherent state,we show that the fidelity between the exact solution for the gate output state and the"perfect"Schrodinger cat reconstructed from the semiclassical theory can reach high values exceeding 0.99.展开更多
The polarization of light,a fundamental property governing light-matter interactions,has historically been engineered in the transverse plane perpendicular to its propagation direction and produced a various spatially...The polarization of light,a fundamental property governing light-matter interactions,has historically been engineered in the transverse plane perpendicular to its propagation direction and produced a various spatially structured light fields,namely,vector beams,exhibiting intriguing phenomena and effects in focusing and light-matter interaction.With the increasing demand for light field manipulation and multiplexing in more dimensions,the polarization modulations along the propagation direction have unveiled the potential of spatially varying polarization states along the optical axis,with significant propagation properties such as selfactivity.This review synthesizes recent research on the longitudinal polarization engineering,emphasizing its theoretical foundations,generation methodologies,and transformative implications.We begin by outlining the polarization evolution dynamics of structured light fields during propagation,highlighting the three-dimensional(3D)variation of state of polarizations.Key techniques for realizing the longitudinal engineering of polarization without changing of transverse intensity profile are discussed.Finally,we discuss the prospect and challenges in longitudinal modulation of polarization such as achieving precise spatiotemporal control and dynamic reconfigurability.展开更多
The exploration of the regulation mechanism about Chern number(C)is crucial for acquiring high topological state in quantum anomalous Hall effect(QAHE).In this study,by symmetry analysis and first-principles calculati...The exploration of the regulation mechanism about Chern number(C)is crucial for acquiring high topological state in quantum anomalous Hall effect(QAHE).In this study,by symmetry analysis and first-principles calculations,monolayer XBiO_(3)(X=Pd,Pt)are proven to be QAH insulators with tunable topological state.As the magnetization direction changes in the xy plane,monolayer XBiO_(3)switch between QAH insulator with C=|1|and topological trivial semimetal with a period of 60°.It is caused by the breaking or protecting mirror symmetries for different polar angles.Comparatively,as the magnetization direction alters in the xz plane,monolayer XBiO_(3)vary among QAH insulator with C=|3|,QAH insulator with C=|1|as well as mixed semimetal and QAH state with a period of 180°.The topological band gaps are as high as 114 and 132 meV for monolayers PdBiO_(3)and PtBiO_(3),respectively.The critical magnetic transition temperature of monolayers PdBiO_(3)and PtBiO_(3)reach up to 432 and 550 K,respectively.Notably,the QAH feature is robust for strains and U values.Our work provides an ideal platform to investigate the tunable high Chern number QAHE and design high performance QAH devices.展开更多
Extending attractive phenomena in non-Hermitian systems is crucial for advancing wave manipulation properties.In this study,we extend the phenomena of coherent perfect absorption-lasing(CPAL)as well as supercollimatio...Extending attractive phenomena in non-Hermitian systems is crucial for advancing wave manipulation properties.In this study,we extend the phenomena of coherent perfect absorption-lasing(CPAL)as well as supercollimation,which were generally achieved at specific angles and frequencies,to broad-angle and broadband,respectively.In an airborne twodimensional phononic crystal,the combination of band folding and gainloss modulation induces a parity–time phase transition,resulting in parity–time broken phase as well as a slab of exceptional points along one of the Brillouin zone boundaries.Based on the analysis of Hamiltonian,we design a Hilbert fractal space-coiling structure that minimizes the dispersion along this boundary.This approach significantly broadens the range of incident angles for CPAL and extends the frequency range for supercollimation.Our findings provide a design strategy for exploring wave manipulation phenomena in two-dimensional parameter spaces.展开更多
We investigate the band structures of strained monolayer and bilayer graphene superlattice,which is formed by subjecting graphene to a periodic uniaxial strain.The strain superlattice is attained by imposing distincti...We investigate the band structures of strained monolayer and bilayer graphene superlattice,which is formed by subjecting graphene to a periodic uniaxial strain.The strain superlattice is attained by imposing distinctively positive and negative strains on opposite halves of the supercell.A controllable band gap and partial flat band are observed in superlattice,with the strain applied along the zigzag and armchair direction respectively.The band gap can be achieved with a small strain applied,and the magnitude of band gap can be tuned by adjusting the strength and smoothness of the strain,with maximal band gaps reaching 1200 meV and 900 meV for monolayer and bilayer graphene,respectively.The partial flat band can be used in inducing quantum valley Hall interface state(QVHIS)localized at the strain interface of bilayer strain superlattice,with a vertical electric field applied simultaneously.Our results provide a strategy for creating controllable band gap or QVHIS in graphene,which could be useful in designing graphene-based electronic devices.展开更多
Recent reactor neutrino oscillation experiments reported precision measurements of sin^(2)(2θ_(13))andΔm_(ee)^(2)under the standard 3νoscillation framework.However,inter-experiment consistency checks through the pa...Recent reactor neutrino oscillation experiments reported precision measurements of sin^(2)(2θ_(13))andΔm_(ee)^(2)under the standard 3νoscillation framework.However,inter-experiment consistency checks through the parameter goodness-of-fit test reveal proximity to tension boundary,with the Double Chooz,RENO,and Daya Bay ensemble yielding pPG=0.14 vs thresholdα=0.1.Anisotropic Lorentz invariance violation(LIV)can accommodate this tension by introducing a location-dependent angleθ^(LIV)relative to the earth’s axis.It is found that anisotropic LIV improve the fit to data up to 1.9σconfidence level significance,with the coefficient A_(31)^(C(0))=2.43×10^(−17)MeV yielding the best fit,while Parameter Goodness-of-fit(PG)is significantly improved within the LIV formalism.展开更多
Topological wireless power transfer(WPT)technologies have attracted considerable interest,primarily due to their high transmission efficiency and robustness in coupled array configurations.However,conventional periodi...Topological wireless power transfer(WPT)technologies have attracted considerable interest,primarily due to their high transmission efficiency and robustness in coupled array configurations.However,conventional periodic and quasi-periodic topological chains exhibit limited adaptability to complex application scenarios,such as large-area simultaneous multi-load charging.In this work,we experimentally demonstrate a large-area robust topological defect state by constructing a gapless chain of uniformly coupled resonators at the interface of two topologically distinct Su–Schrieffer–Heeger(SSH)configurations.This topological defect state exhibits strong localization at multiple target sites,thereby enabling effi-cient and concurrent wireless power delivery to spatially distributed loads.Furthermore,the unique wavefunction distribution enhances robustness against positional variations,thus ensuring stable energy transfer despite fluctuations in device placement.The proposed large-area topological framework offers fundamental insights into harnessing diverse topological states for advanced WPT applications,particularly in scenarios demanding spatial flexibility and multi-target energy delivery.展开更多
We present a novel approach to control light diffraction through a single subwavelength aperture(i.e.,metallic slit)by designing and exploring a resonant metagrating with compound lattice containing two metaatoms.Such...We present a novel approach to control light diffraction through a single subwavelength aperture(i.e.,metallic slit)by designing and exploring a resonant metagrating with compound lattice containing two metaatoms.Such resonant metagrating supports two orthogonal local eigenmodes of opposite symmetry,and a lateral offset between inner metaatoms is intro-duced to break the lattice symmetry to reduce the orthogonality of the two local eigenmodes.We show that the lateral offset offers additional freedom for controlling aperture diffraction,producing both extraordinarily enhanced and extremely suppressed transmissions.The mechanism is that the resonant metagrating serves as a unidirectional nanocoupler that can efficiently convert the incident light into a surface plasmon wave,whose energy direction depends on the lateral offset.Our findings provide a plat-form for advanced nanophotonics,including high-efficiency optical sensors and enhanced nonlinear optical devices.展开更多
Hidden spin polarization(HSP)with zero-net spin polarization in total but non-zero local spin polarization has been proposed in certain nonmagnetic centrosymmetric compounds,where the individual sectors forming the in...Hidden spin polarization(HSP)with zero-net spin polarization in total but non-zero local spin polarization has been proposed in certain nonmagnetic centrosymmetric compounds,where the individual sectors forming the inversion partners are all inversion asymmetry.Here,we extend this idea to antiferromagnetic materials with PT symmetry(the joint symmetry of space inversion symmetry(P)and time-reversal symmetry(T)),producing zero-net spin polarization in total,but either of the two inversion-partner sectors possesses altermagnetism,giving rise to non-zero local spin polarization in real space.This phenomenon can also be termed as hidden altermagnetism.By the first-principle calculations,we predict that PT-symmetric bilayer Cr2SO can serve as a possible candidate showing altermagnetic HSP.By applying an external electric field to break the global P lattice symmetry,the altermagnetic HSP can be separated and observed experimentally.Our works extend the hidden physics,and will also advance the theoretical and experimental search for new type of spin-polarized materials.展开更多
We study the quantum system of three ultracold one-dimensional identical bosons withδ-contact interaction in a harmonic trap by proposing a method termed the generator coordinate method(GCM)-polynomial ansatz(PA).Bas...We study the quantum system of three ultracold one-dimensional identical bosons withδ-contact interaction in a harmonic trap by proposing a method termed the generator coordinate method(GCM)-polynomial ansatz(PA).Based on the asymptotic property of our system,we describe the wave function as a(pseudo-)polynomial multiplied by the asymptotic Gaussian function,then apply the GCM to this PA description to solve the system.Our results include not only the ground and first excited states,which are in agreement with previous calculations,but also a dozen unex-plored excited states.We present and discuss the eigenenergy spectra and eigenstates,including periodic patterns and degeneracies.Additionally,we reproduce the states and properties at extreme interaction limits,such as Bose–Einstein(BE)condensate,fermionization at Tonks–Girardeau(TG)gas limit and TG/super-TG mapping.展开更多
We theoretically study the photon blockade(PB)effect in a double-cavity optomechanical system with the two-photon driving.By analytical calcula-tions and numerical simulations,the physical mechanisms of conventional p...We theoretically study the photon blockade(PB)effect in a double-cavity optomechanical system with the two-photon driving.By analytical calcula-tions and numerical simulations,the physical mechanisms of conventional photon blockade(CPB)and unconventional photon blockade(UPB)are discussed in detail.And then we obtain the optimal parameter conditions for PB.In our work,there exist both the CPB induced by strong nonlinear interaction and the UPB caused by quantum interference.In particular,we find that CPB and UPB can occur simultaneously under the same parame-ters.In addition,we also prove that the appropriate values of nonreciprocal coupling and two-photon driving are favorable to the improvement of PB.Our proposal provides an idea for simultaneously realizing CPB and UPB in the optomechanical system and offers a route for constructing high-quality single-photon sources.展开更多
We review the exotic states,such as the X,Y,Z,T and P states,and present their possible assignments based on the QCD sum rules.We present many predictions which can be confronted to the experimental data in the future...We review the exotic states,such as the X,Y,Z,T and P states,and present their possible assignments based on the QCD sum rules.We present many predictions which can be confronted to the experimental data in the future to diagnose the exotic states.Furthermore,we also mention other theoreti-cal methods.展开更多
As a lens capable of sending images of deep sub-wavelength objects to the far field,the hyperlens has garnered significant attention for its superresolution and magnification capabilities.However,traditional hyperlens...As a lens capable of sending images of deep sub-wavelength objects to the far field,the hyperlens has garnered significant attention for its superresolution and magnification capabilities.However,traditional hyperlenses require extreme permittivity ratios and fail to achieve geometrically perfect imaging,significantly constraining their practical applications.In this paper,we introduce the generalized versions of hyperbolic absolute instruments from the perspective of dispersion and fundamental optical principles.These instruments support the formation of closed orbits in geometric optics,thereby enabling hyperlenses to realize aberration-free perfect imaging.This development not only provides a flexible and practical tool for enhancing the performance of traditional hyperlens,but also opens the possibilities for new optoelectronics applications based on hyperbolic ray dynamics.展开更多
Recently,hardware based bionic perceptual systems have attracted great attention.However,most reported bionic perceptual systems only have a single perceptual function,making it difficult to mimic multi-sensory percep...Recently,hardware based bionic perceptual systems have attracted great attention.However,most reported bionic perceptual systems only have a single perceptual function,making it difficult to mimic multi-sensory perception process in real environments.Here,a bionic tactile-visualmorphic system(BTVMS)is proposed by integrating an indium gallium zinc oxide(IGZO)photoelectronic neuromorphic transistor(PNT)and a PDMS-ZnO based triboelectric nanogenerator(TENG).The IGZO-PNT exhibits stable electrical performance and can sensitively perceive optical stimuli.The PDMS-ZnO based TENG can convert mechanical stimuli into electrical signals,exhibiting a high sensitivity of~0.75 V/kPa and good durability.The proposed BTVMS exhibits information encryption and decryption functions based on Morse code strategy.In addition,it can simulate the tactile and visual dual cognition behavior of brain.Thus,posttraumatic stress disorder behavior has been mimicked successfully.The present BTVMS provides a valuable idea for intelligent prosthetics and humanoid robots to achieve efficient bionic visual and tactile perceptions.展开更多
基金supported by the Fundamental Research Funds for the Central Universities(Grant No.3002000-842364006)Beijing-Changping Innovation Joint Fund Project(Grant No.L234003)of Beijing Natural Science Foundation,the Key R&D Program of Shandong Province(Grant No.2023CXPT101)Zhoushan Oceanthink Marine Science&Technology Co.,Ltd.(Grant No.3002000-961236054100)。
文摘To overcome antimalarial drug resistance,carbohydrate derivatives as selective PfHT1 inhibitor have been suggested in recent experimental work with orthosteric and allosteric dual binding pockets.Inspired by this promising therapeutic strategy,herein,molecular dynamics simulations are performed to investigate the molecular determinants of co-administra-tion on orthosteric and allosteric inhibitors targeting PfHT1.Our binding free energy analyses capture the essential trend of inhibitor binding affinity to protein from published experimental IC50 data in three sets of distinct characteristics.We rank the contribution of key residues as binding sites which categorized into three groups based on linker length,size of tail group,and sugar moiety of inhibitors.The pivotal roles of these key residues are further validated by mutant analysis where mutated to nonpolar alanine leading to reduced affinities to different degrees.The exception was fructose derivative,which exhibited a significant enhanced affinity to mutation on orthosteric sites due to strong changed binding poses.This study may provide useful information for optimized design of precision medicine to circumvent drug-resistant Plasmodium parasites with high efficacy.
基金supported by the National Natural Science Foundation of China(Grant Nos.12175321,W2443004,11975021,11675275,and U1932101)the National Key Research and Development Program of China(Nos.2023YFA1606000 and 2020YFA0406400)+2 种基金the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDA10010900)the National College Students Science and Technology Innovation Projectthe Undergraduate Base Scientific Research Project of Sun Yat-sen University.
文摘While visualization plays a crucial role in high-energy physics(HEP)experiments,the existing detector description formats including Geant4,ROOT,GDML,and DD4hep face compatibility limitations with modern visualization platforms.This paper presents a universal interface that automatically converts these four kinds of detector descriptions into FBX,an industry standard 3D model format which can be seamlessly integrated into advanced visualization platforms like Unity.This method bridges the gap between HEP instrumental display frameworks and industrial-grade visualization ecosystems,enabling HEP experiments to harness rapid technological advancements.Furthermore,it lays the groundwork for the future development of additional HEP visualization applications,such as event display,virtual reality,and augmented reality.
基金supported by the Fundamental Research Funds for the Central Universities(No.2023ZDYQ11003)the China Postdoctoral Science Foundation(No.2023M743784)+2 种基金the State Key Laboratory of Millimeter Waves(No.K202407)the National Natural Science Foundation of China(No.12274315)the Postgraduate Innovation Program of China University of Mining and Technology(No.2024WLJCRCZL298).
文摘Non-Hermitian topological insulators have attracted considerable attention due to their distinctive energy band characteristics and promising applications.Here,we systematically investigate non-Hermitian Möbius insulators and graphene-like topological semimetals from the projected symmetry and realize their corresponding topological phenomena in an electric circuit-based framework.By introducing a nonreciprocal hopping term consisting of negative impedance converters into a two-dimensional electric circuit,we establish an experimental platform that effectively demonstrates that introducing non-Hermitian terms significantly enhances the energy localization of topological edge states,which originate from the non-Hermitian skin effect.Furthermore,a thorough comparison of experimental measurements with numerical simulations validates the robustness and reliability of our electric circuit structure.This work not only reveals the physical properties of non-Hermitian topological materials but also provides valuable theoretical and experimental guidance for the implementation of topological circuits and the design of radiofrequency devices in the future.
基金supported by the National Key Research and Development Program of China(Grant Nos.2021YFA0718300 and 2021YFA1400900)the National Natural Science Foundation of China(Grant Nos.11920101004,11934002,92365208)the Space Application System of China Manned Space Program。
文摘Engineering spin polarization in dissipative bosonic systems is crucial for advancing quantum technologies,especially for applications in quantum metrology and space-based quantum simulations.This work demonstrates precise magnetic moment control in multicomponent Bose gases during evaporative cooling via tailored magnetic fields.By adjusting the magnetic field gradients,null point position,and duration,we selectively tune evap-oration rates of magnetic sublevels,achieving targeted spin polarization.Theoretical models,validated by numerical simulations and Stern–Gerlach experiments,reveal how magnetic fields reshape trapping poten-tials and spin-dependent dissipation.The results establish a dissipative spin-selection mechanism governing polarization evolution in evapora-tively cooled Bose gases and provide a framework for engineering spin-polarized quantum states.
基金supported by the National Key R&D Program of China(Grant No.2022YFA1403000)CAS Project for Young Scientists in Basic Research(Grant No.YSBR-100)+2 种基金the Fundamental Research Funds for the Central Universities(Grant No.WK2140000019)the National Natural Science Foundation of China(Grant Nos.52272095 and 12275272)Collaborative Innovation Program of Hefei Science Center,Chinese Academy of Sciences(Grant No.2022HSC-CIP005).
文摘The discovery of superconductivity in infinite-layer nickelate films marks a groundbreaking addition to the family of unconventional superconductors,providing new insights into mechanism of unconventional high temperature superconductivity.However,synthesizing these superconducting nickelates presents significant challenges:they cannot be grown directly and instead require a two-step synthesis protocol involving initial deposition of a perovskite precursor phase(e.g.,Nd_(0.8)Sr_(0.2)NiO_(3))followed by topotactic reduction to the infinite-layer structure(Nd_(0.8)Sr_(0.2)NiO_(2)).This process is further complicated by the extreme sensitivity of both steps to synthesis conditions,necessitating stringent control over the crystallinity and stoichiometry of the parent phase.In this study,we uncover nickel deficiency during pulsed laser deposition(PLD)of the parent-phase Nd_(0.8)Sr_(0.2)NiO_(3).By incorporating 15% excess nickel into the PLD target,we mitigate this loss,suppress secondary phase formation in the Nd_(0.8)Sr_(0.2)NiO_(3) parent film,and ultimately obtain a phase-pure Nd_(0.8)Sr_(0.2)NiO_(2) film exhibiting superconductivity after following reduction.Notably,we observe a doping-dependent insulator-to-superconductor transition in films synthesized from targets with varying nickel content after reduction.X-ray photoelectron spectroscopy(XPS)confirms that the Nd/Ni ratio in films derived from nickel-over-doped targets(15% excess)aligns closely with the ideal stoichiometry.These findings underscore the indispensable role of stoichiometric precision in stabilizing infinite-layer nickelates and establish a practical synthesis strategy for optimizing their superconducting performance.
基金supported by the National Natural Science Foundation of China(Grant No.11904234).
文摘Topological systems with hybrid topology offer unique opportunities for exploring multiplexing topological phenomena and valuable applications.However,building a hybrid topological superconductor and achieving a controllable topological phase transition between different orders of topo-logical superconductors remain a challenge.We propose a solution to unify both first-and higher-order topological superconductors on a square lattice,incorporating the Rashba spin–orbit coupling,Zeeman field and s-wave superconducting pairing.By utilizing one-dimensional normal edge states,we construct a boundary-obstructed topological superconductor associated with closing the boundary energy gap.This leads to the emer-gence of Majorana corner modes,whose topological properties are charac-terized by the Berry phase.By tuning the amplitude of different intracell hoppings,we can control the localization of Majorana corner modes.We also generalize the Majorana polarization as a topological invariant to verify the existence of Majorana corner modes.Remarkably,the obtained phase diagram is well consistent with that described by the boundary energy gap,a quantized Berry phase and Chern number.With the further increase of Zeeman field,we observe a transition from a second-to first-order topological superconducting phase by closing the bulk gap.Its topol-ogy is protected by the bulk states and characterized by nonzero Chern number.Additionally,no Majorana corner modes are present and the topological boundary states are determined by nonzero Chern number in the region where both the quantized Berry phase and Chern number are nonzero.Furthermore,we achieve the hinge Majorana zero modes in a three-dimensional structure by stacking the two-dimensional square lattices.Our work unveils the physical mechanism to get a topological superconductor with different orders,and opens an avenue to characterize and detect different order topological superconductors on two-dimensional lattices.
基金supported by Russian Science Foundation(project No.24-21-00484).
文摘We consider the generation of Schrodinger cat states using a quantum measurement-induced logical gate where entanglement between the input state of the target oscillator and the Fock state of the ancillary system produced by the quantum non-demolition entangling C_(Z) operation is combined with the homodyne measurement.We utilize the semiclassical approach to construct both the input-output mapping of the field variables in the phase space and the wave function of the output state.This approach is found to predict that the state at the gate output can be represented by a minimally disturbed cat-like state which is a superposition of two copies of the initial state symmetrically displaced by momentum variable.For the target oscillator prepared in the coherent state,we show that the fidelity between the exact solution for the gate output state and the"perfect"Schrodinger cat reconstructed from the semiclassical theory can reach high values exceeding 0.99.
基金supported by the National Natural Science Foundation of China(Nos.12474298 and 12174309)the National Key Research and Development Program of China(No.2022YFA1404800)+2 种基金the Natural Science Basic Research Program of Shaanxi(Grant No.2025JC-JCQN-063)the Fundamental Research Funds for the Central Universities(Grant No.5000230111)the Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University(Grant No.CX2022076).
文摘The polarization of light,a fundamental property governing light-matter interactions,has historically been engineered in the transverse plane perpendicular to its propagation direction and produced a various spatially structured light fields,namely,vector beams,exhibiting intriguing phenomena and effects in focusing and light-matter interaction.With the increasing demand for light field manipulation and multiplexing in more dimensions,the polarization modulations along the propagation direction have unveiled the potential of spatially varying polarization states along the optical axis,with significant propagation properties such as selfactivity.This review synthesizes recent research on the longitudinal polarization engineering,emphasizing its theoretical foundations,generation methodologies,and transformative implications.We begin by outlining the polarization evolution dynamics of structured light fields during propagation,highlighting the three-dimensional(3D)variation of state of polarizations.Key techniques for realizing the longitudinal engineering of polarization without changing of transverse intensity profile are discussed.Finally,we discuss the prospect and challenges in longitudinal modulation of polarization such as achieving precise spatiotemporal control and dynamic reconfigurability.
基金supported by the National Natural Science Foundation of China(Nos.52271238,12261131506,and 12074052)the Liaoning Revitalization Talents Program(No.XLYC2002075)+1 种基金the Natural Science Foundation of Liaoning Province of China(No.2021-YQ-06)the Research Funds for the Central Universities(No.N2402002).
文摘The exploration of the regulation mechanism about Chern number(C)is crucial for acquiring high topological state in quantum anomalous Hall effect(QAHE).In this study,by symmetry analysis and first-principles calculations,monolayer XBiO_(3)(X=Pd,Pt)are proven to be QAH insulators with tunable topological state.As the magnetization direction changes in the xy plane,monolayer XBiO_(3)switch between QAH insulator with C=|1|and topological trivial semimetal with a period of 60°.It is caused by the breaking or protecting mirror symmetries for different polar angles.Comparatively,as the magnetization direction alters in the xz plane,monolayer XBiO_(3)vary among QAH insulator with C=|3|,QAH insulator with C=|1|as well as mixed semimetal and QAH state with a period of 180°.The topological band gaps are as high as 114 and 132 meV for monolayers PdBiO_(3)and PtBiO_(3),respectively.The critical magnetic transition temperature of monolayers PdBiO_(3)and PtBiO_(3)reach up to 432 and 550 K,respectively.Notably,the QAH feature is robust for strains and U values.Our work provides an ideal platform to investigate the tunable high Chern number QAHE and design high performance QAH devices.
基金supported by the Jiangsu Specially Appointed Professor Program,the Special Funds for Postdoctoral Overseas Recruitment,Ministry of Education of China,the National Natural Science Foundation of China(Grant No.12504508)the Natural Science Foundation of Jiangsu Province(Grant No.BK20240576).
文摘Extending attractive phenomena in non-Hermitian systems is crucial for advancing wave manipulation properties.In this study,we extend the phenomena of coherent perfect absorption-lasing(CPAL)as well as supercollimation,which were generally achieved at specific angles and frequencies,to broad-angle and broadband,respectively.In an airborne twodimensional phononic crystal,the combination of band folding and gainloss modulation induces a parity–time phase transition,resulting in parity–time broken phase as well as a slab of exceptional points along one of the Brillouin zone boundaries.Based on the analysis of Hamiltonian,we design a Hilbert fractal space-coiling structure that minimizes the dispersion along this boundary.This approach significantly broadens the range of incident angles for CPAL and extends the frequency range for supercollimation.Our findings provide a design strategy for exploring wave manipulation phenomena in two-dimensional parameter spaces.
基金supported by the National Natural Science Foundation of China(Grant No.12174077)the Bureau of Education of Guangzhou Municipality(Grant No.202255464)+1 种基金the Joint Fund with Guangzhou Municipality(Grant No.202201020238)the Guangdong Basic and Applied Basic Research Foundation(Grant No.2022A1515110011).
文摘We investigate the band structures of strained monolayer and bilayer graphene superlattice,which is formed by subjecting graphene to a periodic uniaxial strain.The strain superlattice is attained by imposing distinctively positive and negative strains on opposite halves of the supercell.A controllable band gap and partial flat band are observed in superlattice,with the strain applied along the zigzag and armchair direction respectively.The band gap can be achieved with a small strain applied,and the magnitude of band gap can be tuned by adjusting the strength and smoothness of the strain,with maximal band gaps reaching 1200 meV and 900 meV for monolayer and bilayer graphene,respectively.The partial flat band can be used in inducing quantum valley Hall interface state(QVHIS)localized at the strain interface of bilayer strain superlattice,with a vertical electric field applied simultaneously.Our results provide a strategy for creating controllable band gap or QVHIS in graphene,which could be useful in designing graphene-based electronic devices.
基金supported in part by the National Natural Science Foundation of China under Grant No.12347105supported in part by the Fundamental Research Funds for the Central Universities(No.23xkjc017)in Sun Yat-sen University.
文摘Recent reactor neutrino oscillation experiments reported precision measurements of sin^(2)(2θ_(13))andΔm_(ee)^(2)under the standard 3νoscillation framework.However,inter-experiment consistency checks through the parameter goodness-of-fit test reveal proximity to tension boundary,with the Double Chooz,RENO,and Daya Bay ensemble yielding pPG=0.14 vs thresholdα=0.1.Anisotropic Lorentz invariance violation(LIV)can accommodate this tension by introducing a location-dependent angleθ^(LIV)relative to the earth’s axis.It is found that anisotropic LIV improve the fit to data up to 1.9σconfidence level significance,with the coefficient A_(31)^(C(0))=2.43×10^(−17)MeV yielding the best fit,while Parameter Goodness-of-fit(PG)is significantly improved within the LIV formalism.
基金supported by the National Key R&D Program of China(Nos.2021YFA1400602 and 2023YFA1407600)the National Natural Science Foundation of China(Nos.12374294 and 52477014)the Chenguang Program of Shanghai(No.21CGA22).
文摘Topological wireless power transfer(WPT)technologies have attracted considerable interest,primarily due to their high transmission efficiency and robustness in coupled array configurations.However,conventional periodic and quasi-periodic topological chains exhibit limited adaptability to complex application scenarios,such as large-area simultaneous multi-load charging.In this work,we experimentally demonstrate a large-area robust topological defect state by constructing a gapless chain of uniformly coupled resonators at the interface of two topologically distinct Su–Schrieffer–Heeger(SSH)configurations.This topological defect state exhibits strong localization at multiple target sites,thereby enabling effi-cient and concurrent wireless power delivery to spatially distributed loads.Furthermore,the unique wavefunction distribution enhances robustness against positional variations,thus ensuring stable energy transfer despite fluctuations in device placement.The proposed large-area topological framework offers fundamental insights into harnessing diverse topological states for advanced WPT applications,particularly in scenarios demanding spatial flexibility and multi-target energy delivery.
基金supported by the National Natural Science Foundation of China(Grant Nos.12274225,12274313 and 12274314)the Natural Science Foundation of Jiangsu Province(Grant No.BK20230089)+1 种基金the Collaborative Innovation Center of Suzhou Nano Science and Technology,and Suzhou Basic Research Project(No.SJC2023003)the Gusu Leading Talent Plan for Scientific and Technological Innovation and Entrepreneurship(ZXL2024400).
文摘We present a novel approach to control light diffraction through a single subwavelength aperture(i.e.,metallic slit)by designing and exploring a resonant metagrating with compound lattice containing two metaatoms.Such resonant metagrating supports two orthogonal local eigenmodes of opposite symmetry,and a lateral offset between inner metaatoms is intro-duced to break the lattice symmetry to reduce the orthogonality of the two local eigenmodes.We show that the lateral offset offers additional freedom for controlling aperture diffraction,producing both extraordinarily enhanced and extremely suppressed transmissions.The mechanism is that the resonant metagrating serves as a unidirectional nanocoupler that can efficiently convert the incident light into a surface plasmon wave,whose energy direction depends on the lateral offset.Our findings provide a plat-form for advanced nanophotonics,including high-efficiency optical sensors and enhanced nonlinear optical devices.
基金supported by the Natural Science Basis Research Plan in Shaanxi Province of China(No.2025JC-YBMS-008).
文摘Hidden spin polarization(HSP)with zero-net spin polarization in total but non-zero local spin polarization has been proposed in certain nonmagnetic centrosymmetric compounds,where the individual sectors forming the inversion partners are all inversion asymmetry.Here,we extend this idea to antiferromagnetic materials with PT symmetry(the joint symmetry of space inversion symmetry(P)and time-reversal symmetry(T)),producing zero-net spin polarization in total,but either of the two inversion-partner sectors possesses altermagnetism,giving rise to non-zero local spin polarization in real space.This phenomenon can also be termed as hidden altermagnetism.By the first-principle calculations,we predict that PT-symmetric bilayer Cr2SO can serve as a possible candidate showing altermagnetic HSP.By applying an external electric field to break the global P lattice symmetry,the altermagnetic HSP can be separated and observed experimentally.Our works extend the hidden physics,and will also advance the theoretical and experimental search for new type of spin-polarized materials.
基金supported by the National Key R&D Program of China(No.2023YFA1606701)supported in part by the National Natural Science Foundation of China under contract Nos.12175042,11890710,11890714,12047514,12147101,12347106。
文摘We study the quantum system of three ultracold one-dimensional identical bosons withδ-contact interaction in a harmonic trap by proposing a method termed the generator coordinate method(GCM)-polynomial ansatz(PA).Based on the asymptotic property of our system,we describe the wave function as a(pseudo-)polynomial multiplied by the asymptotic Gaussian function,then apply the GCM to this PA description to solve the system.Our results include not only the ground and first excited states,which are in agreement with previous calculations,but also a dozen unex-plored excited states.We present and discuss the eigenenergy spectra and eigenstates,including periodic patterns and degeneracies.Additionally,we reproduce the states and properties at extreme interaction limits,such as Bose–Einstein(BE)condensate,fermionization at Tonks–Girardeau(TG)gas limit and TG/super-TG mapping.
基金supported by the National Natural Science Foundation of China(Grant No.12204310)the Shanghai Sailing Program(Grant No.21YF1446900).
文摘We theoretically study the photon blockade(PB)effect in a double-cavity optomechanical system with the two-photon driving.By analytical calcula-tions and numerical simulations,the physical mechanisms of conventional photon blockade(CPB)and unconventional photon blockade(UPB)are discussed in detail.And then we obtain the optimal parameter conditions for PB.In our work,there exist both the CPB induced by strong nonlinear interaction and the UPB caused by quantum interference.In particular,we find that CPB and UPB can occur simultaneously under the same parame-ters.In addition,we also prove that the appropriate values of nonreciprocal coupling and two-photon driving are favorable to the improvement of PB.Our proposal provides an idea for simultaneously realizing CPB and UPB in the optomechanical system and offers a route for constructing high-quality single-photon sources.
基金supported by the National Natural Science Foundation of China under(Grant No.12175068).
文摘We review the exotic states,such as the X,Y,Z,T and P states,and present their possible assignments based on the QCD sum rules.We present many predictions which can be confronted to the experimental data in the future to diagnose the exotic states.Furthermore,we also mention other theoreti-cal methods.
基金supported by the National Key Research and Development Program of China(No.2023YFA1407100)the National Natural Science Foundation of China(No.12361161667)Fujian Provincial Natural Science Foundation of China(No.2024J011002).
文摘As a lens capable of sending images of deep sub-wavelength objects to the far field,the hyperlens has garnered significant attention for its superresolution and magnification capabilities.However,traditional hyperlenses require extreme permittivity ratios and fail to achieve geometrically perfect imaging,significantly constraining their practical applications.In this paper,we introduce the generalized versions of hyperbolic absolute instruments from the perspective of dispersion and fundamental optical principles.These instruments support the formation of closed orbits in geometric optics,thereby enabling hyperlenses to realize aberration-free perfect imaging.This development not only provides a flexible and practical tool for enhancing the performance of traditional hyperlens,but also opens the possibilities for new optoelectronics applications based on hyperbolic ray dynamics.
基金the support by the National Natural Science Foundation of China(Nos.U22A2075 and 51972316)Ningbo Key Scientific and Technological Project(No.2021Z116).
文摘Recently,hardware based bionic perceptual systems have attracted great attention.However,most reported bionic perceptual systems only have a single perceptual function,making it difficult to mimic multi-sensory perception process in real environments.Here,a bionic tactile-visualmorphic system(BTVMS)is proposed by integrating an indium gallium zinc oxide(IGZO)photoelectronic neuromorphic transistor(PNT)and a PDMS-ZnO based triboelectric nanogenerator(TENG).The IGZO-PNT exhibits stable electrical performance and can sensitively perceive optical stimuli.The PDMS-ZnO based TENG can convert mechanical stimuli into electrical signals,exhibiting a high sensitivity of~0.75 V/kPa and good durability.The proposed BTVMS exhibits information encryption and decryption functions based on Morse code strategy.In addition,it can simulate the tactile and visual dual cognition behavior of brain.Thus,posttraumatic stress disorder behavior has been mimicked successfully.The present BTVMS provides a valuable idea for intelligent prosthetics and humanoid robots to achieve efficient bionic visual and tactile perceptions.
