物理学报2026，Vol.75Issue(11)：48-58,11.DOI:10.7498/aps.75.20260222
非厄米双势阱中自旋-轨道耦合玻色原子的非互易Floquet隧穿动力学
Nonreciprocal Floquet tunneling dynamics of spin-orbit-coupled bosonic atoms in non-Hermitian double-well potentials
摘要
Abstract
The stable tunneling dynamics in non-Hermitian quantum systems is one of the fundamental issues in the study of quantum transport.Nonreciprocal coupling,as another crucial manifestation of non-Hermiticity,exerts significant regulatory effects on the stability of quantum devices and spin tunneling dynamics.Here,we place spin-orbit coupled bosonic atoms in a double-well potential with gain and loss,investigating the effect of nonreciprocal coupling on the system dynamics.Through analytical analysis of the Floquet states and quasi-energy spectrum under periodic driving,we obtain the PT symmetry phase diagram of the system.We further explore the synergistic regulation mechanism of multiple factors,including the strength of nonreciprocal coupling,the non-Hermitian strength arising from gain-loss,and periodic driving-on stable spin-flip tunneling.The results demonstrate that precise manipulation of nonreciprocity and gain-loss can significantly expand the stable parameter region of the system.In nonreciprocal systems with balanced gain and loss,the continuity and discreteness of the stable parameter region are determined by the parity of the driving frequency ratio Ω/ω,and the spin-flip tunneling can be precisely controlled via the parameters λ and 2ε/ω.For the unbalanced gain-loss scenario,the equilibrium conditions for achieving stable spin-flip tunneling under different parities of Ω/ωare further provided.These findings offer a new theoretical approach for realizing robust spin-flip tunneling,provide guiding significance for the study of quantum state transport in non-Hermitian ultracold atomic systems,and also serve as a reference for the experimental design of novel spin-based quantum devices.关键词
自旋-轨道耦合/非厄米双势阱/非互易/隧穿动力学Key words
spin-orbit coupling/non-Hermitian double-well potential/nonreciprocity/tunneling dynamics引用本文复制引用
巨丽梅,张莹莹,梁继磊,常守康,朱遵略,秦璐,刘伍明,赵兴东..非厄米双势阱中自旋-轨道耦合玻色原子的非互易Floquet隧穿动力学[J].物理学报,2026,75(11):48-58,11.基金项目
国家自然科学基金(批准号:62505079,12404377,12334012,12234012,52327808,62575314,2024YFF0726700,2021YFA1400900,2021YFA0718300)、河南省自然科学基金(批准号:252300421995)和中国博士后科学基金(批准号:2025M783380)资助的课题. Project supported by the National Natural Science Foundation of China(Grant Nos.62505079,12404377,12334012,12234012,52327808,62575314,2024YFF0726700,2021YFA1400900,2021YFA0718300),the Natural Science Foundation of Henan Province,China(Grant No.252300421995),and the China Postdoctoral Science Foundation(Grant No.2025M783380). （批准号:62505079,12404377,12334012,12234012,52327808,62575314,2024YFF0726700,2021YFA1400900,2021YFA0718300）
