PMID: 17155781Dec 13, 2006Paper

Entanglement entropy beyond the free case

Physical Review Letters
Thomas BarthelJulien Vidal

Abstract

We present a perturbative method to compute the ground state entanglement entropy for interacting systems. We apply it to a collective model of mutually interacting spins in a magnetic field. At the quantum critical point, the entanglement entropy scales logarithmically with the subsystem size, the system size, and the anisotropy parameter. We determine the corresponding scaling prefactors and evaluate the leading finite-size correction to the entropy. Our analytical predictions are in perfect agreement with numerical results.

References

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Citations

Oct 13, 2007·Physical Review Letters·Pedro RibeiroRémy Mosseri
Oct 15, 2008·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Ho-Man KwokHai-Qing Lin
Feb 20, 2013·Journal of Physics. Condensed Matter : an Institute of Physics Journal·V M L Durga Prasad GoliDiptiman Sen
Feb 18, 2017·Physical Review. E·José A CarrascoMiguel A Rodríguez
Oct 15, 2008·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Pedro RibeiroRémy Mosseri
Nov 13, 2008·Physical Review Letters·Aditi Sen DeMaciej Lewenstein
Dec 31, 2008·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Jian MaXiaoguang Wang
Aug 7, 2007·Physical Review Letters·M CramerM B Plenio
Feb 1, 2008·Physical Review Letters·Géza TóthHans J Briegel
Mar 16, 2007·Physical Review Letters·Masudul HaqueKareljan Schoutens
Oct 2, 2009·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Jian MaShi-Jian Gu

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