B. Çakmak, G. Karpat, Z. Gedik
We investigate the thermal quantum and total correlations in the one-dimensional anisotropic XY spin chain with transverse magnetic field. While we adopt concurrence and geometric quantum discord to measure quantum correlations, we use measurement-induced nonlocality and an alternative quantity defined in terms of Wigner-Yanase information to quantify total correlations (or nonlocality). We show that the ability of these measures to estimate the critical points of the system at finite temperature strongly depend on the anisotropy parameter of the Hamiltonian. Furthermore, we study the effect of temperature on long-range correlations of the system.
View original:
http://arxiv.org/abs/1206.1019
No comments:
Post a Comment