Decoherence and relaxation of topological states in extended quantum Ising models

被引：3
作者：
Weisbrich, Hannes [1 ]
Belzig, Wolfgang [1 ]
Rastelli, Gianluca [1 ,2 ]
机构：
[1] Univ Konstanz, Fachbereich Phys, D-78457 Constance, Germany
[2] Univ Konstanz, Zukunftskolleg, D-78457 Constance, Germany
来源：
SCIPOST PHYSICS | 2019年 / 6卷 / 03期
关键词：
STATISTICAL-MECHANICS; ENTANGLEMENT; TEMPERATURE; SYSTEMS; DRIVEN; CHAIN;
D O I：
10.21468/SciPostPhys.6.3.037
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We study the decoherence and the relaxation dynamics of topological states in an extended class of quantum Ising chains which can present a multidimensional ground state subspace. The leading interaction of the spins with the environment is assumed to be the local fluctuations of the transverse magnetic field. By deriving the Lindblad equation using the many-body states, we investigate the relation between decoherence, energy relaxation and topology. In particular, in the topological phase and at low temperature, we analyze the dephasing rates between the different degenerate ground states.
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页数：24
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