Entanglement Hamiltonians and entropy in 1+1D chiral fermion systems
Abstract
In past work we introduced a method which allows for exact computations of entanglement Hamiltonians. The method relies on computing the resolvent for the projected (on the entangling region) Green's function using a solution to the Riemann-Hilbert problem combined with finite rank perturbation theory. Here we analyze in detail several examples involving excited states of chiral fermions (Dirac and Majorana) on a spatial circle. We compute the exact entanglement Hamiltonians and an exact formula for the change in entanglement entropy due to the introduction of a particle above the Dirac sea. For Dirac fermions, we give the first-order temperature correction to the entanglement entropy in the case of a multiple interval entangling region.
Keywords
Cite
@article{arxiv.1704.01536,
title = {Entanglement Hamiltonians and entropy in 1+1D chiral fermion systems},
author = {Israel Klich and Diana Vaman and Gabriel Wong},
journal= {arXiv preprint arXiv:1704.01536},
year = {2018}
}
Comments
22 pages, 3 Figures