Chin. Phys. Lett.  2011, Vol. 28 Issue (5): 050309    DOI: 10.1088/0256-307X/28/5/050309
GENERAL |
Entanglement Enhancement in an XY Spin Chain
SU Xiao-Qiang**
College of Physics and Information Engineering, Shanxi Normal University, Linfen 041004
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SU Xiao-Qiang 2011 Chin. Phys. Lett. 28 050309
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Abstract We study evolution of entanglement in an XY-type spin channel and find that the entanglement can be enhanced by the spin channel. The parameter regions of the initial states for different numbers of sites are obtained. Furthermore, we consider a common spin environment coupling to the spin chains and find that the entanglement enhancement can also be implemented only for the chains with the odd numbers of sites.
Keywords: 03.67.Mn      03.67.Hk      05.50.+q     
Received: 14 December 2010      Published: 26 April 2011
PACS:  03.67.Mn (Entanglement measures, witnesses, and other characterizations)  
  03.67.Hk (Quantum communication)  
  05.50.+q (Lattice theory and statistics)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/28/5/050309       OR      https://cpl.iphy.ac.cn/Y2011/V28/I5/050309
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SU Xiao-Qiang
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