Study of entanglement in a quantum antiferromagnet

Abstract

The absolute temperature (T) and magnetic field (B) dependent magnetization(M) and study of entanglement out of the experimental data is reported for dichloro(thiazole)copper(II), a Heisenberg spin chain system. The magnetic susceptibility (χ) vs. T plot assures the behavior of infinite spin chain. The M vs. B data has been taken at different temperature as long as the antiferromagnetic(AFM) correlations persist significantly. M, B and T have been plotted in a 3D plot showing explicitly the dependence of the three parameters on one another. Since the concurrence is a measure of entanglement, the value of concurrence is extracted from the χ vs. T data and that's how the information about entanglement is extracted from the macroscopic magnetic susceptibility.