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arXiv · 1812.02835

Entanglement in anisotropic expanding spacetime

Roberto Pierini·Shahpoor Moradi·Stefano Mancini
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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 can only get entangled through anisotropy, with a maximum of entanglement entropy occurring at k > 0.

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Roberto Pierini, Shahpoor Moradi, Stefano Mancini. 2018-12-06. Entanglement in anisotropic expanding spacetime. https://doi.org/10.1140/epjd%2Fe2019-90463-y

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