References & Citations
High Energy Physics - Theory
Title: Entropy of Flat Space Cosmologies from Celestial dual
(Submitted on 4 Oct 2023 (v1), last revised 1 Feb 2024 (this version, v3))
Abstract: We construct a one-dimensional dual theory that effectively describes the sector of the (2+1)D flat gravity phase space near a Flat Space Cosmology (FSC) saddle labeled by definite mass and angular momentum. This Schwarzian type action describes the dynamics of the (Pseudo-) Goldstone Bosons of BMS$_3$ algebra on a circle as the symmetry is spontaneously and anomalously broken. This 1D theory, living on the celestial circle, provides an explicit construction of a celestial dual in (2+1)D. We use it to calculate the semiclassical entropy of Flat Space Cosmologies and find perfect agreement with existing literature.
Submission history
From: Muktajyoti Saha [view email][v1] Wed, 4 Oct 2023 09:39:44 GMT (225kb)
[v2] Tue, 14 Nov 2023 06:51:31 GMT (52kb)
[v3] Thu, 1 Feb 2024 16:01:52 GMT (52kb)
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