Ground-state instabilities and entanglement in the spin-boson model

Ru Fen Liu, Chia Chu Chen

研究成果: Article同行評審

2 引文 斯高帕斯(Scopus)

摘要

Ground-state instabilities of the spin-boson model is studied in this work. The existence of sequential ground-state instabilities is shown analytically for arbitrary detuning in the two-spin system. In this model, extra discontinuities of concurrence (entanglement measure) are found in the finite system, which do not appear in the on-resonant model. The above results remain intact by including extra boson modes. Moreover, by including extra modes, it is found that ground-state entanglement can be obtained and enhanced even in the weak coupling regime.

原文English
頁(從 - 到)631-645
頁數15
期刊Physica A: Statistical Mechanics and its Applications
374
發行號2
DOIs
出版狀態Published - 2007 2月 1

All Science Journal Classification (ASJC) codes

  • 統計與概率
  • 凝聚態物理學

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