Spin-orbital entanglement near quantum phase transitions
Strongly Correlated Electrons
2007-06-19 v1
Abstract
Spin-orbital entanglement in the ground state of a one-dimensional SU(2)SU(2) spin-orbital model is analyzed using exact diagonalization of finite chains. For spins and pseudospins one finds that the quantum entanglement is similar at the SU(4) symmetry point and in the spin-orbital valence bond state. We also show that quantum transitions in spin-orbital models turn out to be continuous under certain circumstances, in constrast to the discontinuous transitions in spin models with SU(2) symmetry.
Keywords
Cite
@article{arxiv.0706.2477,
title = {Spin-orbital entanglement near quantum phase transitions},
author = {Andrzej M. Oles and Peter Horsch and Giniyat Khaliullin},
journal= {arXiv preprint arXiv:0706.2477},
year = {2007}
}