Decoherence, entanglement, and chaos in the Dicke model

Xi Wen Hou*, Bambi Hu

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

57 Citations (Scopus)


The entanglement dynamics in the Dicke model (DM) without rotating-wave approximation (RWA) with varied coupling parameter and initial quantum states was analyzed. The reduced-linear density entropy was use to measure the entanglement. The characteristic time of decoherence process in the early-time evolution was numerically obtained. The initial conditions were taken to be minimum uncertainty wave packets centered at regular and chaotic regions of the classical phase space for a given energy. The results show that the entanglement has a distinct change at the quantum phase transition and the entanglement for regular initial conditions is smaller than that for chaotic ones in the case weak coupling.

Original languageEnglish
Article number042110
Number of pages6
JournalPhysical Review A
Issue number4
Publication statusPublished - 23 Apr 2004

Scopus Subject Areas

  • Atomic and Molecular Physics, and Optics


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