Entanglement sudden death in a spin channel
Xiao Qiang Su, An Min Wang, XIAO SAN MA, Liang Qiu · Journal of Physics A Mathematical and Theoretical · 2007
We study the dynamic evolution of the entanglement in a spin channel with an XY-type interaction initially in an entangled state. We find that the phenomenon of entanglement sudden death (ESD) appears in the evolution of entanglement for some initial states. We calculate the entanglement and obtain the parameter regions of disentanglement for the chains with several numbers of sites. The influence of the presence of one common spin environment is also discussed.