Entanglement entropy in quasi-symmetric multi-qubit states
Quantum Physics
2013-10-14 v1
Abstract
We generalize the symmetric multi-qubit states to their q-analogs, whose basis vectors are identified with the q-Dicke states. We study the entanglement entropy in these states and find that entanglement is extruded towards certain regions of the system due to the inhomogeneity aroused by q-deformation. We also calculate entanglement entropy in ground states of a related q-deformed Lipkin-Meshkov-Glick model and show that the singularities of entanglement can correctly signify the quantum phase transition points for different strengths of q-deformation.
Keywords
Cite
@article{arxiv.1310.3089,
title = {Entanglement entropy in quasi-symmetric multi-qubit states},
author = {Zhi-Hua Li and An-Min Wang},
journal= {arXiv preprint arXiv:1310.3089},
year = {2013}
}
Comments
11 pages, 2 figures