Quantum phase transition and entanglement in Li atom system
Quantum Physics
2009-11-13 v2
Abstract
In this paper we study the quantum phase transition and entanglement in s1=1/2 and s2=1 spin pair system by the exact diagonalization method. We show that, for this exactly solvable quantum bi-spin system, entanglement appears before quantum phase transition and disappears after it. Moreover, we show that the von Neumann entropy, as a measure of entanglement, can reveal quantum phase transition in this system.
Cite
@article{arxiv.0705.0184,
title = {Quantum phase transition and entanglement in Li atom system},
author = {Li-Ming Si and Ji-Xuan Hou},
journal= {arXiv preprint arXiv:0705.0184},
year = {2009}
}