Quantum Phase Transitions and Matrix Product States in Spin Ladders
Quantum Physics
2009-11-13 v2 Strongly Correlated Electrons
Abstract
We investigate quantum phase transitions in ladders of spin 1/2 particles by engineering suitable matrix product states for these ladders. We take into account both discrete and continuous symmetries and provide general classes of such models. We also study the behavior of entanglement of different neighboring sites near the transition point and show that quantum phase transitions in these systems are accompanied by divergences in derivatives of entanglement.
Cite
@article{arxiv.quant-ph/0612207,
title = {Quantum Phase Transitions and Matrix Product States in Spin Ladders},
author = {M. Asoudeh and V. Karimipour and A. Sadrolashrafi},
journal= {arXiv preprint arXiv:quant-ph/0612207},
year = {2009}
}
Comments
20 pages, 6 figures, essential changes (i.e derivation of the Hamiltonian), Revtex