Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
978281 | Physica A: Statistical Mechanics and its Applications | 2007 | 15 Pages |
Abstract
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.
Related Topics
Physical Sciences and Engineering
Mathematics
Mathematical Physics
Authors
Ru-Fen Liu, Chia-Chu Chen,