Wang Wen-Ge, Liu Jie, Li Baowen
Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China.
Phys Rev E Stat Nonlin Soft Matter Phys. 2008 May;77(5 Pt 2):056218. doi: 10.1103/PhysRevE.77.056218. Epub 2008 May 30.
We study the stability of a two-component Bose-Einstein condensate (BEC) in the parameter regime in which its classical counterpart has regular motion. The stability is characterized by the fidelity for both the same and different initial states. We study as initial states the Fock states with definite numbers of atoms in each component of the BEC. It is found that for some initial times the two Fock states with all the atoms in the same component of the BEC are more stable than Fock states with atoms distributed in the two components. An experimental scheme is discussed, in which the fidelity can be measured in a direct way.
我们研究了一种双组分玻色 - 爱因斯坦凝聚体（BEC）在其经典对应物具有规则运动的参数区域中的稳定性。稳定性通过相同和不同初始状态下的保真度来表征。我们将BEC各组分中具有确定原子数的福克态作为初始状态进行研究。结果发现，在某些初始时刻，BEC同一组分中所有原子的两个福克态比原子分布在两个组分中的福克态更稳定。文中讨论了一种实验方案，通过该方案可以直接测量保真度。
