Eur. Phys. J. D 33, 265-272 (2005)
https://doi.org/10.1140/epjd/e2005-00054-4

Quantum entanglement and chaos in kicked two-component Bose-Einstein condensates

Department of physics, Hunan Normal University, Changsha 410081, P.R. China

Corresponding author: ^a adcve@public.cs.hn.cn

Received: 4 January 2005
Revised: 31 January 2005
Published online: 3 May 2005

Abstract

We study two-component Bose-Einstein condensates that behave collectively as a spin system obeying the dynamics of a quantum kicked top. Depending on the nonlinear interaction between atoms in the classical limit, the kicked top exhibits both regular and chaotic dynamical behavior. The quantum entanglement is physically meaningful if the system is viewed as a bipartite system, where the subsystem is any one of the two modes. The dynamics of the entanglement between the two modes in this classical chaotic system has been investigated. The chaos leads to rapid rise and saturation of the quantum entanglement. Furthermore, the saturated values of the entanglement fall short of its maximum. The mean entanglement has been used to clearly display the close relation between quantum entanglement and underlying chaos.