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 arXiv.org (one of the alternative locations)
URI:	http://hdl.handle.net/2289/7831
ISSN:	0370-2693
Alternative Location:	https://arxiv.org/abs/2104.08449 https://doi.org/10.1016/j.physletb.2021.136567 https://ui.adsabs.harvard.edu/abs/2021PhLB..82036567M/abstract
Copyright:	2021 The Author(s)
Appears in Collections:	Research Papers (TP)

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