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The European Physical Journal D

, Volume 61, Issue 3, pp 791–796 | Cite as

Entanglement dynamics of three-qubit coupled to an XY spin chain at finite temperature with three-site interaction

  • J. L. Guo
  • H. S. Song
Article

Abstract.

The entanglement dynamics of three-qubit states under an XY spin chain at finite temperature with three-site interaction is investigated. It is shown that the three-site interaction does not affect the behavior of quantum phase transition (QPT) induced by the external magnetic field and does not induce new critical regions in the XY model. In addition, concerned with the effect of the three-site interaction on the entanglement evolution, we find the three-site interaction can not only enhance but also suppress the decay of the entanglement between the three-qubit system, which depends on the initial states of the system and the parameters related with the environmental spin chain.

Keywords

Spin Chain Quantum Phase Transition Entanglement Dynamic Entanglement Evolution Multipartite Entanglement 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  1. 1.Department of Applied PhysicsHebei University of TechnologyTianjinP.R. China
  2. 2.School of physics and optoelectronic technology, Dalian University of TechnologyDalianP.R. China

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