1211.5907 (Mohammad Reza Pourkarimi et al.)

Decoherence effect on quantum correlation and entanglement in a
two-qubit spin chain    [PDF]

Mohammad Reza Pourkarimi, Majid Rahnama

Assuming a two-qubit system in Werner state which evolves in Heisenberg XY model with Dzyaloshinskii-Moriya (DM) interaction under different environment, we evaluate and compare quantum entanglement and quantum and classical correlation measures. We show that in the absence of decoherence effects, there is a critical value of DM interaction for which entanglement may vanish while quantum and classical correlations do not. In the presence of environment the behavior of correlations are different and depends on the kind of system-environment interaction.

View original: http://arxiv.org/abs/1211.5907