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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. 相似文献
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Geometric phases and quantum phase transitions in inhomogeneous XY spin-chains:Effect of the Dzyaloshinski-Moriya interaction 下载免费PDF全文
We study geometric phases of the ground states of
inhomogeneous XY spin chains in transverse fields with
Dzyaloshinski--Moriya (DM) interaction, and investigate the effect
of the DM interaction on the quantum phase transition (QPT) of such
spin chains. The results show that the DM interaction could
influence the distribution of the regions of QPTs but could not
produce new critical points for the spin-chain. This study extends
the relation between geometric phases and QPTs. 相似文献
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