频率随时间变化的受迫谐振子的压缩态和压缩数态

研究了频率随时间变化的受迫谐振子系统的不变量和不变量的一般形式,并利用基本不变量构造了此含时系统的压缩态和压缩数态.     

强磁场中碱金属原子原演化和Aharonov—Anandan相因子

利用量子不变量理论研究了任意随变化的强磁场中碱金属原子系统的演化问题，得到了此精确的演化态，并利用此精确的演化态求出了相应的Ａｈａｒｏｎｏｖ－Ａｎａｎｄａｎ相因子和绝热极限下的Ｂｅｒｒｙ相因子。将此系统精确的演化按哈密顿量的瞬音本征态展开，可以得到绝热近似似的任意阶修正。     

Quantum Nonlocality and Entanglement of Pair Cat States with Phase Decoherence

We investigate the entanglement of pair cat states in the phase damping channel by adopting the log-negativity and then study the possible violations of Bell＇s inequalities for the pair cat states in terms of the Wigner representation in phase space based upon parity measurement and displacement operation.     

Entanglement Dynamics of a Three-Level Atom in Ξ Configuration

Dynamical behaviour of entanglement between the cavity mode and a three-level atom in the configuration is studied by making use of log-negativity. The influence of initial temperature of the thermal field and detuning on the entanglement is investigated. It is found that the maximal values of entanglement decreases with the temperature of the thermal field and can be controlled by the defaming.     

THE EXACT SOLUTION OF A TWO-LEVEL ATOM MOVING IN A QUANTIZED TRAVELLING LIGHT FIELD AND A GRAVITATIONAL FIELD

We adopt a dynamical algebraic approach to study the system of a two-level atom moving in a quantized travelling light field and a gravitational field with a multiphoton interaction. The exact solution of the system is obtained and used to discuss the influence of the gravitational field on the collapses and revivals of atomic population, sub-Poissonian statistics.     

随时间变化磁场中自肇1／2粒子的演化和几何相因子

利用不变量理论研究了自旋１／２粒子在一类较普遍的随时间变化的磁场中的演化问题，并对此类系统的几何相因了仔细的讨论。     

光子数增加的q—相干态的非线典特性

在推广的对易关系ａａ＾＋－ｑａ＾＋ａ＝１下，研究了光子数增加的ｑ－相干态的量子统计性质，利用形变的ｑ－Ｌａｇｕｅｒｒｅ多项式，给出了其经典特性随形变参数ｑ变化的解析表达式。     

Entanglement transfer via two arrays of coupled resonator waveguides

We propose a scheme for transferring entanglement through two independent arrays of coupled resonator waveguides,where a three-level atom is embedded in each resonator.We investigate the entanglement dynamics of the transferred state.The influence of initial states and applied lasers on the entanglement sudden death phenomenon is also discussed.Furthermore,we study the dynamics of pairwise quantum correlations measured by the quantum discord.     

Controlling quantum discord dynamics in cavity QED systems by applying a classical driving field with phase decoherence

We investigate a two-level atom interacting with a quantized cavity field and a classical driving field in the presence of phase decoherence and find that a stationary quantum discord can arise in the interaction of the atom and cavity field as the time turns to infinity.We also find that the stationary quantum discord can be increased by applying a classical driving field.Furthermore,we explore the quantum discord dynamics of two identical non-interacting two-level atoms independently interacting with a quantized cavity field and a classical driving field in the presence of phase decoherence.Results show that the quantum discord between two atoms is more robust than entanglement under phase decoherence and the classical driving field can help to improve the amount of quantum discord of the two atoms.