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Partition function of a volume of space in a higher curvature theory
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Date
2023-08-15
Author
Tavlayan, Aydın
Tekin, Bayram
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Recently, Jacobson and Visser [Partition Function for a Volume of Space, Phys. Rev. Lett. 130, 221501 (2023).PRLTAO0031-900710.1103/PhysRevLett.130.221501] calculated the quantum partition function of a fixed, finite volume of a region with the topology of a ball in the saddle point approximation within the context of Einstein's gravity with or without a cosmological constant. The result can be interpreted as the dimension of Hilbert space of the theory. Here we extend their computation to a theory defined in principle with infinitely many powers of curvature in three dimensions. We confirm their result: The partition function of a spatial region in the leading saddle point approximation is given as the exponential of the Bekenstein-Hawking or the Wald entropy of the boundary of the finite spatial region both in the case of zero and finite cosmological constant. In the latter case, the effective Newton's constant appears in the entropy formula. The calculations lend support to the holographic nature of gravity for finite regions of space with a boundary.
URI
https://hdl.handle.net/11511/105913
Journal
Physical Review D
DOI
https://doi.org/10.1103/physrevd.108.l041902
Collections
Department of Physics, Article
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A. Tavlayan and B. Tekin, “Partition function of a volume of space in a higher curvature theory,”
Physical Review D
, vol. 108, no. 4, pp. 0–0, 2023, Accessed: 00, 2023. [Online]. Available: https://hdl.handle.net/11511/105913.