Entanglement as a quantum order parameter
Quantum Physics
2007-05-23 v4
Abstract
We show that the quantum order parameters (QOP) associated with the transitions between a normal conductor and a superconductor in the BCS and eta-pairing models and between a Mott-insulator and a superfluid in the Bose-Hubbard model are directly related to the amount of entanglement existent in the ground state of each system. This gives a physical meaningful interpretation to these QOP, which shows the intrinsically quantum nature of the phase transitions considered.
Cite
@article{arxiv.quant-ph/0509049,
title = {Entanglement as a quantum order parameter},
author = {Fernando Guadalupe Santos Lins Brandao},
journal= {arXiv preprint arXiv:quant-ph/0509049},
year = {2007}
}
Comments
5 pages. No figures. Revised version. References added