Non-Markovianity of a qubit coupled with an isotropic Lipkin-Meshkov-Glick bath

doi:10.1088/1674-1056/24/10/100305

Abstract We study the non-Markovianity of the single qubit system coupled with an isotropic Lipkin-Meshkov-Glick (LMG) model by an effective method proposed by Breuer et al. (Breuer H P and Piilo J 2009 Europhys. Lett. 85 5004). It is discovered that the non-Markovianity is concerned with the quantum phase transitions (QPTs). In the open system, we present that the strong coupling inside the bath and the strong interaction between the system and bath can enhance the degree of non-Markovianity. Moreover, the non-Markovianity is stronger and more sensitive for the bath in the symmetric phase than the symmetry broken phase.

Keywords: non-Markovianity qubit dynamics LMG model

Received: 08 March 2015
Revised: 03 May 2015
Accepted manuscript online:

PACS:	03.65.Yz	(Decoherence; open systems; quantum statistical methods)
	05.45.-a	(Nonlinear dynamics and chaos)
	75.10.Pq	(Spin chain models)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11075101).

Corresponding Authors: Tian Li-Jun
E-mail: tianlijun@staff.shu.edu.cn

Cite this article:

Tian Li-Jun (田立君), Ti Min-Min (提敏敏), Zhai Xiang-Dong (翟向东) Non-Markovianity of a qubit coupled with an isotropic Lipkin-Meshkov-Glick bath 2015 Chin. Phys. B 24 100305

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Non-Markovianity of a qubit coupled with an isotropic Lipkin-Meshkov-Glick bath

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