Eur. Phys. J. D 39, 277-282 (2006)
https://doi.org/10.1140/epjd/e2006-00103-6

Quantum entanglement and classical bifurcations in a coupled two-component Bose-Einstein condensate

¹ Department of physics, Hunan Normal University, Changsha, 410081, P.R. China
² Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan, 430071, P.R. China

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

Received: 6 November 2005
Revised: 18 January 2006
Published online: 18 May 2006

Abstract

We investigate the relation between quantum states and classical fixed-point bifurcations in a coupled two-component Bose-Einstein condensate (BEC). It is shown that the classical bifurcations are closely related to a topological change of the corresponding quantum levels, and such a structure change can be manifested in the entanglement properties of the corresponding quantum states. That is, the entanglement of the quantum states displays some peaks near the classical bifurcation points.