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Evolution and Generation of Dynamics of Two-Mode Squeezed States of Time-Dependent Coupled Boson System
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作者 ZHANG Xue ZHENG Tai-Yu ZHENG Li 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第10期955-960,共6页
The system of the Hamiltonian involving a driving part,a single mode part,and a two-mode squeezedone and a two-mode coupled one is discussed using the Lewis-Riesenfeld invariant theory.The time evolution operatoris ob... The system of the Hamiltonian involving a driving part,a single mode part,and a two-mode squeezedone and a two-mode coupled one is discussed using the Lewis-Riesenfeld invariant theory.The time evolution operatoris obtained.When the initial state is a coherent state,the quantum fluctuation of the system is calculated,and it isdependent on the squeezed part and the two-mode coupled part,but not dependent on the driving one. 展开更多
关键词 two-mode squeezed states lewis Riesenfeld invariant theory time evolution operator
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Lie transformation on shortcut to adiabaticity in parametric driving quantum systems
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作者 Jian-Jian Cheng Yao Du Lin Zhang 《Chinese Physics B》 SCIE EI CAS CSCD 2021年第6期111-115,共5页
Shortcut to adiabaticity(STA) is a speedway to produce the same final state that would result in an adiabatic, infinitely slow process. Two typical techniques to engineer STA are developed by either introducing auxili... Shortcut to adiabaticity(STA) is a speedway to produce the same final state that would result in an adiabatic, infinitely slow process. Two typical techniques to engineer STA are developed by either introducing auxiliary counterdiabatic fields or finding new Hamiltonians that own dynamical invariants to constraint the system into the adiabatic paths. In this paper,an efficient method is introduced to naturally cover the above two techniques with a unified Lie algebraic framework and neatly remove the design difficulties and loose assumptions in the two techniques. A general STA scheme for different potential expansions concisely achieves with the aid of squeezing transformations. 展开更多
关键词 shortcut to adiabaticity parametric driving lewis–Riesenfeld invariants
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Rashba Effect in Presence of Time-Dependent Interaction
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作者 Hadi Sobhani Hassan Hassanabadi 《Communications in Theoretical Physics》 SCIE CAS CSCD 2016年第5期543-545,共3页
Rashba effect in presence of a time-dependent interaction has been considered.Then time-evolution of such a system has been studied by using Lewis–Riesenfeld dynamical invariant and unitary transformation method.So a... Rashba effect in presence of a time-dependent interaction has been considered.Then time-evolution of such a system has been studied by using Lewis–Riesenfeld dynamical invariant and unitary transformation method.So appropriate dynamical invariant and unitary transformation according the considered system have been constructed as well as some special cases have come into this article which are common in physics. 展开更多
关键词 Rashba effect time-dependent interaction lewis–Riesenfeld dynamical invariant unitary transformation method
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