If the singularity of the cosmic Big Bang is taken as the origin of the reference coordinate system,the surrounding vacuum in the initial moments of it would exhibit radially-outward right-handed spiral motion at ligh...If the singularity of the cosmic Big Bang is taken as the origin of the reference coordinate system,the surrounding vacuum in the initial moments of it would exhibit radially-outward right-handed spiral motion at light speed.Based on this spatial motion hypothesis,we derive a unified field equation and a set of Maxwell’s equations for vacuum SWs(Scalar Waves)generating a huge spiral force field that drives the energy to spiral inwardly and distort,leading to the formation of mass.Furthermore,they also uncover that mass is fundamentally an ultimate expression of energy,manifesting as the result of spiral motion of space at light speed.And then,we indirectly validate the theory that coherent light waves’collision generate SWs and subsequently mass through the experiment verifying the Breit-Wheeler process.The establishment of our theory offers a new analytical tool for the exploration of mass origin,the cosmic Big Bang,unified field theories.展开更多
QED(quantum electrodynamics)is the QFT(quantum field theory)describing the interaction between light and matter.While conventional QED is based on TEM(transverse electromagnetic)waves,there has been increasing interes...QED(quantum electrodynamics)is the QFT(quantum field theory)describing the interaction between light and matter.While conventional QED is based on TEM(transverse electromagnetic)waves,there has been increasing interest in the theoretical and experimental exploration of LSW(longitudinal scalar waves)solutions that are often omitted in CED(classical electrodynamics)but may have physical significance in nontrivial vacuum conditions.This paper delves into the theoretical foundation of LSW,their role in QED,and the associated mathematical equations governing their dynamics.展开更多
The circuit quantum electrodynamics(QED)system has brought us into an ultrastrong and deep coupling regime in the light-matter interaction community,in which the quantum effect has attracted significant interest.In th...The circuit quantum electrodynamics(QED)system has brought us into an ultrastrong and deep coupling regime in the light-matter interaction community,in which the quantum effect has attracted significant interest.In this study,we theoretically investigated the photon blockade phenomenon in a double-transmon system operating in an ultrastrong coupling regime.We considered the effect of the counter-rotating wave terms in the interaction Hamiltonian and derived the master equation in the eigenpresentation.We found that photon blockade occurred in only one of the eigenmodes,and the counter-rotating wave terms enhanced the blockade by reducing the minimum value of the second-order correlation function.This study will be beneficial for the design of single-photon devices in circuit QED systems,especially in the ultrastrong coupling regime.展开更多
The properties of the non-trivial quantum state in an all-optical environment come mainly from the higher-order quantum electrodynamics effect,which remains one of the few unverified predictions of this theory due to ...The properties of the non-trivial quantum state in an all-optical environment come mainly from the higher-order quantum electrodynamics effect,which remains one of the few unverified predictions of this theory due to its weak signal.Here,we propose a scheme specifically designed to detect this quantum vacuum,where a tightly focused pump laser interacts with an optical frequency comb(OFC)in its resonant cavity.When the OFC pulse passes through the vacuum polarized by the high-intensity pump laser,its carrier frequency and envelope change.This can be intuitively understood as the asymmetric photon acceleration induced by the ponderomotive force of the pump laser.By leveraging the exceptional ultrahigh frequency and temporal resolution of the OFC,this scheme holds the potential to improve the accuracy of quantum vacuum signal.Combining theoretical and simulation results,we discuss possible experimental conditions,and the detectable OFC signal is shown to be orders of magnitude better than the instrumental detection threshold.This shows our scheme can be verified on the forthcoming laser systems.展开更多
We have investigated the gauge dependence of physical observables in a quantum Rabi model under different potential fields arising from the Hilbert space truncation of the atomic degrees of freedom.In both the square-...We have investigated the gauge dependence of physical observables in a quantum Rabi model under different potential fields arising from the Hilbert space truncation of the atomic degrees of freedom.In both the square-well and harmonic potentials,the optimal gauge for the ground-state energy depends on the cavity frequency,which is optimal in the low-frequency limit,whereas the Coulomb gauge is optimal in the high-frequency limit.For a dynamic quantity,such as an out-of-time-order correlator,we have demonstrated the necessity of introducing an optimal dynamic gauge.This study provides deeper insight into the intricate relationship between gauge choice and the dynamics of quantum electrodynamics systems,resulting in more accurate theoretical frameworks.展开更多
文摘If the singularity of the cosmic Big Bang is taken as the origin of the reference coordinate system,the surrounding vacuum in the initial moments of it would exhibit radially-outward right-handed spiral motion at light speed.Based on this spatial motion hypothesis,we derive a unified field equation and a set of Maxwell’s equations for vacuum SWs(Scalar Waves)generating a huge spiral force field that drives the energy to spiral inwardly and distort,leading to the formation of mass.Furthermore,they also uncover that mass is fundamentally an ultimate expression of energy,manifesting as the result of spiral motion of space at light speed.And then,we indirectly validate the theory that coherent light waves’collision generate SWs and subsequently mass through the experiment verifying the Breit-Wheeler process.The establishment of our theory offers a new analytical tool for the exploration of mass origin,the cosmic Big Bang,unified field theories.
文摘QED(quantum electrodynamics)is the QFT(quantum field theory)describing the interaction between light and matter.While conventional QED is based on TEM(transverse electromagnetic)waves,there has been increasing interest in the theoretical and experimental exploration of LSW(longitudinal scalar waves)solutions that are often omitted in CED(classical electrodynamics)but may have physical significance in nontrivial vacuum conditions.This paper delves into the theoretical foundation of LSW,their role in QED,and the associated mathematical equations governing their dynamics.
基金supported by the National Science Foundation of China(Grant No.12105026)Climbing Plan of Changchun University(Grant No.ZKP202010)Educational Commission of Jilin Province of China(Grant No.JJKH20230663KJ)。
文摘The circuit quantum electrodynamics(QED)system has brought us into an ultrastrong and deep coupling regime in the light-matter interaction community,in which the quantum effect has attracted significant interest.In this study,we theoretically investigated the photon blockade phenomenon in a double-transmon system operating in an ultrastrong coupling regime.We considered the effect of the counter-rotating wave terms in the interaction Hamiltonian and derived the master equation in the eigenpresentation.We found that photon blockade occurred in only one of the eigenmodes,and the counter-rotating wave terms enhanced the blockade by reducing the minimum value of the second-order correlation function.This study will be beneficial for the design of single-photon devices in circuit QED systems,especially in the ultrastrong coupling regime.
基金supported by the National Key R&D Program of China(Grant Nos.2022YFA1603200,2022YFA1603201,2024YFA1613400)the National Natural Science Foundation of China(Grant Nos.12135001,11825502,12075014,12475243)+2 种基金the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDA25050900)the Science and Technology on Plasma Physics Laboratory(Grant No.6142A04210110)the National Natural Science Funds for Distinguished Young Scholars(Grant No.11825502)。
文摘The properties of the non-trivial quantum state in an all-optical environment come mainly from the higher-order quantum electrodynamics effect,which remains one of the few unverified predictions of this theory due to its weak signal.Here,we propose a scheme specifically designed to detect this quantum vacuum,where a tightly focused pump laser interacts with an optical frequency comb(OFC)in its resonant cavity.When the OFC pulse passes through the vacuum polarized by the high-intensity pump laser,its carrier frequency and envelope change.This can be intuitively understood as the asymmetric photon acceleration induced by the ponderomotive force of the pump laser.By leveraging the exceptional ultrahigh frequency and temporal resolution of the OFC,this scheme holds the potential to improve the accuracy of quantum vacuum signal.Combining theoretical and simulation results,we discuss possible experimental conditions,and the detectable OFC signal is shown to be orders of magnitude better than the instrumental detection threshold.This shows our scheme can be verified on the forthcoming laser systems.
基金supported by the National Natural Science Foundation of China(Grant Nos.12174194 and 12475033)the Fundamental Research Funds for the Central Universities。
文摘We have investigated the gauge dependence of physical observables in a quantum Rabi model under different potential fields arising from the Hilbert space truncation of the atomic degrees of freedom.In both the square-well and harmonic potentials,the optimal gauge for the ground-state energy depends on the cavity frequency,which is optimal in the low-frequency limit,whereas the Coulomb gauge is optimal in the high-frequency limit.For a dynamic quantity,such as an out-of-time-order correlator,we have demonstrated the necessity of introducing an optimal dynamic gauge.This study provides deeper insight into the intricate relationship between gauge choice and the dynamics of quantum electrodynamics systems,resulting in more accurate theoretical frameworks.
