摘要
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.
作者
SU Xiao-Qiang
苏晓强(College of Physics and Information Engineering,Shanxi Normal University,Linfen 041004)
基金
Supported by the National Natural Science Foundation of China under Grant No 10975125
the Natural Science Youth Foundation of Shanxi Province under Grant No 2009021005.
