Quantum fluctuation dynamics in momentum spread of cold atoms  

作　　者：WANG Zhong-jie, WANG Qin-mou, HUANG Wan-xia(Department of Physics Anhui Normal University, Wuhu 241000, P. R. China) 

出　　处：《原子与分子物理学报》2003年第4期549-552,共4页Journal of Atomic and Molecular Physics

基　　金：SupportedbytheNaturalScienceFoundationofAnhuiNormalUniversity .

摘　　要：Dynamics of the quantum system that consists of a cold atom in a modulated standing wave of light is analyzed using the time-dependent variational principle formulation based on squeezed coherent states. A group of ordinary differential equations describing evolution of two pairs of canonically conjugate variables (q(t), p(t); G(t), Π(t)) are derived where G(t) and Π(t) describe the quantum fluctuations of the system. It has been shown that a transition from the regular motion to the chaotic motion in G(t), Π(t) phase space. Quantum system seems to be capable to show the classical-like chaotic structure.Dynamics of the quantum system that consists of a cold atom in a modulated standing wave of light is analyzed using the time-dependent variational principle formulation based on squeezed coherent states. A group of ordinary differential equations describing evolution of two pairs of canonically conjugate variables (q(t), p(t); G(t), Π(t)) are derived where G(t) and Π(t) describe the quantum fluctuations of the system. It has been shown that a transition from the regular motion to the chaotic motion in G(t), Π(t) phase space. Quantum system seems to be capable to show the classical-like chaotic structure.

关 键 词：量子波动 混沌 量子力学 薛定锷方程 类经典混沌结构 

分 类 号：O413.1[理学—理论物理]