Bi-partite entanglement entropy in massive two-dimensional quantum field theory

Details Bi-partite entanglement entropy in massive two-dimensional quantum field theory Bi-partite entanglement entropy in massive two-dimensional quantum field theory

2008-03-13

arxiv.org/abs/0803.1999v2

Phys.Rev.Lett.102:031602,2009

Physics

High Energy Physics

High Energy Physics - Theory

5 pages, 2 figures. v2: improved presentation of result and calculations, section "discussion" adjusted, references adjusted

Scientific paper

10.1103/PhysRevLett.102.031602

Recently, Cardy, Castro Alvaredo and the author obtained the first exponential correction to saturation of the bi-partite entanglement entropy at large region length, in massive two-dimensional integrable quantum field theory. It only depends on the particle content of the model, and not on the way particles scatter. Based on general analyticity arguments for form factors, we propose that this result is universal, and holds for any massive two-dimensional model (also out of integrability). We suggest a link of this result with counting pair creations far in the past.

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