Entanglement enhancement in spatially inhomogeneous many-body systems

Tobias Brünner, Erich Runge, Andreas Buchleitner, and Vivian V. França
Phys. Rev. A 87, 032311 – Published 11 March 2013

Abstract

We investigate the effects of spatial inhomogeneities on the entanglement of modes of strongly correlated systems in the framework of small Fermi-Hubbard chains. We find regimes where entanglement is strongly enhanced by the presence of inhomogeneities. This contrasts with recent reports of entanglement destruction due to inhomogeneities. We further study this phenomenon using concepts of density functional theory and, thus, provide a general recipe for the prediction of entanglement enhancement in nanostructures. We find enhancement of up to 27%, as compared to impurity-free chains.

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  • Received 14 September 2012

DOI:https://doi.org/10.1103/PhysRevA.87.032311

©2013 American Physical Society

Authors & Affiliations

Tobias Brünner1,2, Erich Runge2, Andreas Buchleitner1, and Vivian V. França1,3

  • 1Physikalisches Institut der Albert-Ludwigs Universität, Hermann-Herder-Str. 3, D-79104 Freiburg, Germany
  • 2Institut für Physik der Technischen Universität Ilmenau, Weimarer Str. 25, D-98684 Ilmenau, Germany
  • 3Capes Foundation, Ministry of Education of Brazil, Caixa Postal 250, 70040-20 Brasilia, Brazil

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Issue

Vol. 87, Iss. 3 — March 2013

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