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.
| Original language | English |
|---|---|
| Pages (from-to) | 631-645 |
| Number of pages | 15 |
| Journal | Physica A: Statistical Mechanics and its Applications |
| Volume | 374 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2007 Feb 1 |
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All Science Journal Classification (ASJC) codes
- Statistics and Probability
- Condensed Matter Physics
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Ground-state instabilities and entanglement in the spin-boson model. / Liu, Ru Fen; Chen, Chia-Chu.
In: Physica A: Statistical Mechanics and its Applications, Vol. 374, No. 2, 01.02.2007, p. 631-645.Research output: Contribution to journal › Article
TY - JOUR
T1 - Ground-state instabilities and entanglement in the spin-boson model
AU - Liu, Ru Fen
AU - Chen, Chia-Chu
PY - 2007/2/1
Y1 - 2007/2/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=33751074724&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33751074724&partnerID=8YFLogxK
U2 - 10.1016/j.physa.2006.08.063
DO - 10.1016/j.physa.2006.08.063
M3 - Article
VL - 374
SP - 631
EP - 645
JO - Physica A: Statistical Mechanics and its Applications
JF - Physica A: Statistical Mechanics and its Applications
SN - 0378-4371
IS - 2
ER -