Optimal coupled-cluster approximation for the ground-state properties of a spin-boson model
Publication in refereed journal


引用次數
替代計量分析
.

其它資訊
摘要In the present work we have developed an optimal coupled-cluster approximation, which can take care of both the accuracies of the ground-state energy and the wavefunction estimates, for the ground state of a two-state system coupled to a dispersionless boson bath. This new approach is also able to give a tight upper bound to the ground-state energy of the system. Up to the fourth level of this approximation our results show excellent agreement with the numerical exact diagonalization results. In particular, our results suggest no discontinuous localization-delocalization transition of the two-state system. This is consistent with the exact result.
著者Wong WH, Lo CF
期刊名稱European Physical Journal B: Condensed Matter and Complex Systems
出版年份1998
月份11
日期1
卷號6
期次2
出版社SPRINGER VERLAG
頁次213 - 223
國際標準期刊號1434-6028
電子國際標準期刊號1434-6036
語言英式英語
Web of Science 學科類別Physics; Physics, Condensed Matter; PHYSICS, CONDENSED MATTER

上次更新時間 2020-11-07 於 01:50