Quantum Phase Transition in Dimerized Spin-1/2 Chains
Quantum Physics
2015-03-31 v1
Abstract
Quantum phase transition in dimerized antiferromagnetic Heisenberg spin chain has been studied. A staircase structure in the variation of concurrence within strongly coupled pairs with that of external magnetic field has been observed indicating multiple critical points. Emergence of entanglement due to external magnetic field or magnetic entanglement is observed for weakly coupled spin pairs in the same dimer chain. Though closed dimerized isotropic XXX Heisenberg chains with different dimer strengths were mainly explored, analogous studies on open chains as well as closed anisotropic (XX interaction) chains with tilted external magnetic field have also been studied.
Cite
@article{arxiv.1503.08716,
title = {Quantum Phase Transition in Dimerized Spin-1/2 Chains},
author = {Aparajita Das and Sreeparna Bhadra and Sonali Saha},
journal= {arXiv preprint arXiv:1503.08716},
year = {2015}
}
Comments
11 pages, 13 figures in pdf