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Entanglement entropy beyond the free case

Publication ,  Journal Article
Barthel, T; Dusuel, S; Vidal, J
Published in: Physical Review Letters
January 1, 2006

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. © 2006 The American Physical Society.

Duke Scholars

Published In

Physical Review Letters

DOI

EISSN

1079-7114

ISSN

0031-9007

Publication Date

January 1, 2006

Volume

97

Issue

22

Related Subject Headings

  • General Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences
 

Citation

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Barthel, T., Dusuel, S., & Vidal, J. (2006). Entanglement entropy beyond the free case. Physical Review Letters, 97(22). https://doi.org/10.1103/PhysRevLett.97.220402
Barthel, T., S. Dusuel, and J. Vidal. “Entanglement entropy beyond the free case.” Physical Review Letters 97, no. 22 (January 1, 2006). https://doi.org/10.1103/PhysRevLett.97.220402.
Barthel T, Dusuel S, Vidal J. Entanglement entropy beyond the free case. Physical Review Letters. 2006 Jan 1;97(22).
Barthel, T., et al. “Entanglement entropy beyond the free case.” Physical Review Letters, vol. 97, no. 22, Jan. 2006. Scopus, doi:10.1103/PhysRevLett.97.220402.
Barthel T, Dusuel S, Vidal J. Entanglement entropy beyond the free case. Physical Review Letters. 2006 Jan 1;97(22).

Published In

Physical Review Letters

DOI

EISSN

1079-7114

ISSN

0031-9007

Publication Date

January 1, 2006

Volume

97

Issue

22

Related Subject Headings

  • General Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences