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Entanglement in anisotropic expanding spacetime

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Abstract

We study the effect of space anisotropy in the entanglement generated by expanding universe on spin 0 and 1/2 fields. For massive scalar field we find revivals of entanglement entropy vs. momentum after decreasing from the maximum at k = 0. In massive Dirac field the effect is a slight distortion of the non-monotonic profile giving rise to the maximum of entanglement entropy at k > 0. More interestingly, massless field of both type show that can only get entangled through anisotropy, with a maximum of entanglement entropy occurring at k > 0.

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Authors and Affiliations

  1. Institute of Theoretical Physics, University of Warsaw, Pasteura 5, 02-093 Warsaw, Poland

    Roberto Pierini

  2. University of Calgary, Department of Geoscience, Calgary, Canada

    Shahpoor Moradi

  3. School of Science and Technology, University of Camerino, 62032, Camerino, Italy

    Stefano Mancini

  4. INFN-Sezione di Perugia, 06123, Perugia, Italy

    Stefano Mancini

Authors
  1. Roberto Pierini
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  2. Shahpoor Moradi
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  3. Stefano Mancini
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Correspondence to Stefano Mancini.

Additional information

Contribution to the Topical Issue “Quantum Correlations”, edited by Marco Genovese, Vahid Karimipour, Sergei Kulik, and Olivier Pfister.

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Pierini, R., Moradi, S. & Mancini, S. Entanglement in anisotropic expanding spacetime. Eur. Phys. J. D 73, 33 (2019). https://doi.org/10.1140/epjd/e2019-90463-y

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  • DOI: https://doi.org/10.1140/epjd/e2019-90463-y

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