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http://hdl.handle.net/2248/2264
Title: | Entropy of the gravitational field |
Authors: | Rothman, Tony Anninos, Peter |
Keywords: | Black-Hole entropy Spacetimes Measure of Inhomogeneity |
Issue Date: | 1997 |
Publisher: | Astronomical Society of India |
Citation: | BASI, Vol. 25, No. 3, pp. 395 - 399 |
Abstract: | We develop a formulation of the entropy of the gravitational field by adopting the statistical mechanics expression for entropy S = lnΩ, where Ω is the phase space of the field bounded by a Hamiltonian. Phase space is calculated for gravitational waves and radiation and density perturbations in expanding FLRW spacetimes, attributing entropy to a lack of knowledge in the exact field configuration. In all cases, S behaves monotonically as required for a definition of gravitational entropy and is a good measure of inhomogeneity. It also reduces to black-hole entropy under appropriate circumstances. |
URI: | http://hdl.handle.net/2248/2264 |
Appears in Collections: | BASI Publications |
Files in This Item:
File | Description | Size | Format | |
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Rothman.pdf | 379.32 kB | Adobe PDF | View/Open |
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