Entanglement entropy of two disjoint intervals in conformal field theory
High Energy Physics - Theory
2009-12-03 v2 Statistical Mechanics
Quantum Physics
Abstract
We study the entanglement of two disjoint intervals in the conformal field theory of the Luttinger liquid (free compactified boson). Tr\rho_A^n for any integer n is calculated as the four-point function of a particular type of twist fields and the final result is expressed in a compact form in terms of the Riemann-Siegel theta functions. In the decompactification limit we provide the analytic continuation valid for all model parameters and from this we extract the entanglement entropy. These predictions are checked against existing numerical data.
Keywords
Cite
@article{arxiv.0905.2069,
title = {Entanglement entropy of two disjoint intervals in conformal field theory},
author = {Pasquale Calabrese and John Cardy and Erik Tonni},
journal= {arXiv preprint arXiv:0905.2069},
year = {2009}
}
Comments
34 pages, 7 figures. V2: Results for small x behavior added, typos corrected and refs added