Detecting the phases of the superconducting order parameter is pivotal for unraveling the pairing symmetry of superconducting electrons.Conventional methods for probing these phases have focused on macroscopic interfe...Detecting the phases of the superconducting order parameter is pivotal for unraveling the pairing symmetry of superconducting electrons.Conventional methods for probing these phases have focused on macroscopic interference effects,such as the Josephson effect.However,at the microscopic level,phase interference effects within momentum space have remained elusive due to the inherent difficulty of extracting phase information from individual momentum points.By introducing the hybridization effect between a primary band and its replica bands arising from density wave orders or other interactions,we uncover a novel superconducting phase interference effect at the intersection points on the Fermi surfaces of these bands.This effect elucidates the remarkable anomalies recently observed in the single-particle spectral function through angle-resolved photoemission spectroscopy(ARPES)in(Bi2212)superconductors.It can also emerge in twisted junctions of superconductors with coherent tunneling,offering an alternative framework for probing the relative superconducting phase through twisted superstructures.展开更多
Quantum computing has shown great potential in various quantum chemical applications such as drug discovery,material design,and catalyst optimization.Although significant progress has been made in the quantum simulati...Quantum computing has shown great potential in various quantum chemical applications such as drug discovery,material design,and catalyst optimization.Although significant progress has been made in the quantum simulation of simple molecules,ab initio simulation of solid-state materials on quantum computers is still in its early stage,mostly owing to the fact that the system size quickly becomes prohibitively large when approaching the thermodynamic limit.In this work,we introduce an orbital-based multifragment approach on top of the periodic density matrix embedding theory,resulting in a significantly smaller problem size for the current near-term quantum computer.We demonstrate the accuracy and efficiency of our method compared with the conventional methodologies and experiments on solid-state systems with complex electronic structures.These include spin-polarized states of a hydrogen chain(1D-H),the equation of state of a boron nitride layer(h-BN)as well as the magnetic ordering in nickel oxide(NiO),a prototypical strongly correlated solid.Our results suggest that quantum embedding combined with a chemically intuitive fragmentation can greatly advance quantum simulation of realistic materials,thereby paving the way for solving important yet classically hard industrial problems on near-term quantum devices.展开更多
基金supported by the National Natural Science Foundation of China(12488201)the National Key Research and Development Program of China(2021YFA1401800).
文摘Detecting the phases of the superconducting order parameter is pivotal for unraveling the pairing symmetry of superconducting electrons.Conventional methods for probing these phases have focused on macroscopic interference effects,such as the Josephson effect.However,at the microscopic level,phase interference effects within momentum space have remained elusive due to the inherent difficulty of extracting phase information from individual momentum points.By introducing the hybridization effect between a primary band and its replica bands arising from density wave orders or other interactions,we uncover a novel superconducting phase interference effect at the intersection points on the Fermi surfaces of these bands.This effect elucidates the remarkable anomalies recently observed in the single-particle spectral function through angle-resolved photoemission spectroscopy(ARPES)in(Bi2212)superconductors.It can also emerge in twisted junctions of superconductors with coherent tunneling,offering an alternative framework for probing the relative superconducting phase through twisted superstructures.
文摘Quantum computing has shown great potential in various quantum chemical applications such as drug discovery,material design,and catalyst optimization.Although significant progress has been made in the quantum simulation of simple molecules,ab initio simulation of solid-state materials on quantum computers is still in its early stage,mostly owing to the fact that the system size quickly becomes prohibitively large when approaching the thermodynamic limit.In this work,we introduce an orbital-based multifragment approach on top of the periodic density matrix embedding theory,resulting in a significantly smaller problem size for the current near-term quantum computer.We demonstrate the accuracy and efficiency of our method compared with the conventional methodologies and experiments on solid-state systems with complex electronic structures.These include spin-polarized states of a hydrogen chain(1D-H),the equation of state of a boron nitride layer(h-BN)as well as the magnetic ordering in nickel oxide(NiO),a prototypical strongly correlated solid.Our results suggest that quantum embedding combined with a chemically intuitive fragmentation can greatly advance quantum simulation of realistic materials,thereby paving the way for solving important yet classically hard industrial problems on near-term quantum devices.
