Thermal quantum discord in Heisenberg models with Dzyaloshinski–Moriya interaction

doi:10.1088/1674-1056/20/4/040305

中国物理B ›› 2011, Vol. 20 ›› Issue (4): 40305-040305.doi: 10.1088/1674-1056/20/4/040305

Thermal quantum discord in Heisenberg models with Dzyaloshinski–Moriya interaction

王林成, 闫俊彦, 衣学喜

School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China

收稿日期:2010-09-09 修回日期:2011-01-04 出版日期:2011-04-15 发布日期:2011-04-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 10905007 and 61078011) and the Fundamental Research Funds for the Central Universities.

Thermal quantum discord in Heisenberg models with Dzyaloshinski–Moriya interaction

Wang Lin-Cheng(王林成)^†, Yan Jun-Yan(闫俊彦), and Yi Xue-Xi(衣学喜)^‡

School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China

Received:2010-09-09 Revised:2011-01-04 Online:2011-04-15 Published:2011-04-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 10905007 and 61078011) and the Fundamental Research Funds for the Central Universities.

摘要/Abstract

摘要： We study the quantum discord of the bipartite Heisenberg model with the Dzyaloshinski-Moriya (DM) interaction in thermal equilibrium state and discuss the effect of the DM interaction on the quantum discord. The quantum entanglement of the system is also discussed and compared with quantum discord. Our results show that the quantum discord may reveal more properties of the system than quantum entanglement and the DM interaction may play an important role in the Heisenberg model.

Abstract: We study the quantum discord of the bipartite Heisenberg model with the Dzyaloshinski-Moriya (DM) interaction in thermal equilibrium state and discuss the effect of the DM interaction on the quantum discord. The quantum entanglement of the system is also discussed and compared with quantum discord. Our results show that the quantum discord may reveal more properties of the system than quantum entanglement and the DM interaction may play an important role in the Heisenberg model.

Key words: quantum discord, thermal equilibrium state, Heisenberg model, Dzyaloshinski--Moriya interaction

中图分类号: (Entanglement and quantum nonlocality)

03.65.Ud

75.10.Pq (Spin chain models) 05.30.-d (Quantum statistical mechanics)

王林成, 闫俊彦, 衣学喜. Thermal quantum discord in Heisenberg models with Dzyaloshinski–Moriya interaction[J]. 中国物理B, 2011, 20(4): 40305-040305.

Wang Lin-Cheng(王林成), Yan Jun-Yan(闫俊彦), and Yi Xue-Xi(衣学喜) . Thermal quantum discord in Heisenberg models with Dzyaloshinski–Moriya interaction[J]. Chin. Phys. B, 2011, 20(4): 40305-040305.

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Thermal quantum discord in Heisenberg models with Dzyaloshinski–Moriya interaction

Thermal quantum discord in Heisenberg models with Dzyaloshinski–Moriya interaction

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