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Title: A spacetime calculation of the Calabrese-Cardy entanglement entropy
Authors: Mathur, Abhishek
Surya, Sumati
Nomaan, X
Issue Date: Sep-2021
Publisher: Elsevier B.V.
Citation: Physics Letters B, 2021, Vol.820, p136567
Abstract: We calculate Sorkin's spacetime entanglement entropy of a Gaussian scalar field for complementary regions in the 2d cylinder spacetime and show that it has the Calabrese-Cardy form. We find that the cut-off dependent term is universal when we use a covariant UV cut-off as in [1]. In addition, we show that the relative size-dependent term exhibits complementarity. Its coefficient is however not universal and depends on the choice of pure state. It asymptotes to the universal form within a natural class of pure states.
Description: Restricted Access. An open-access version is available at (one of the alternative locations)
ISSN: 0370-2693
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Copyright: 2021 The Author(s)
Appears in Collections:Research Papers (TP)

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