Quantum phase transition in the sub-Ohmic spin-boson model: An extended coherent-state approach
Quantum phase transition in the sub-Ohmic spin-boson model: An extended coherent-state approach
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亚欧姆自旋玻色子模型中的量子相变:一种扩展的相干态方法
DOI:
10.1103/physrevb.81.121105
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发表时间:
2009-12
影响因子:
3.7
通讯作者:
Wang, Ke-Lin
中科院分区:
文献类型:
--
作者:
Zhang, Yu-Yu;Chen, Qing-Hu;Wang, Ke-Lin
We propose a general extended coherent state approach to the qubit (or fermion) and multimode boson coupling systems. The application to the spin-boson model with the discretization of a bosonic bath with arbitrary continuous spectral density is described in detail, and very accurate solutions can be obtained. The quantum phase transition in the nontrivial sub-Ohmic case can be located by the fidelity and the order-parameter critical exponents for the bath exponents $sl1/2$ can be correctly given by the fidelity susceptibility, demonstrating the strength of the approach.
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DOI:
--
发表时间:
1998-03
期刊:
Dictionary of Geotourism
影响因子:
--
作者:
Klaus Völker
通讯作者:
Klaus Völker
影响因子:
3.7
作者:
D. Tolkunov;D. Solenov
通讯作者:
D. Tolkunov;D. Solenov
影响因子:
3.7
作者:
M. Vojta;R. Bulla;Fabian Guettge;F. Anders
通讯作者:
M. Vojta;R. Bulla;Fabian Guettge;F. Anders
影响因子:
2.4
作者:
Zanardi, Paolo;Paunkovic, Nikola
通讯作者:
Paunkovic, Nikola
DOI:
10.1142/1476
发表时间:
1993-03
期刊:
--
影响因子:
--
作者:
U. Weiss
通讯作者:
U. Weiss