Wang, Zhi-Wei and Braunstein, Samuel Leon orcid.org/0000-0003-4790-136X (2018) Surfaces away from horizons are not thermodynamic. Nature Communications. 2977. ISSN 2041-1723
Abstract
Since the 1970s, it has been known that black-hole (and other) horizons are truly thermodynamic. More generally, surfaces which are not horizons have also been conjectured to behave thermodynamically. Initially, for surfaces microscopically expanded from a horizon to so-called stretched horizons, and more recently, for more general ordinary surfaces in the emergent gravity program. To test these conjectures we ask whether such surfaces satisfy an analogue to the first law of thermodynamics (as do horizons). For static asymptotically flat spacetimes we find that such a first law holds on horizons. We prove that this law remains an excellent approximation for stretched horizons, but counter-intuitively this result illustrates the insufficiency of the laws of black-hole mechanics alone from implying truly thermodynamic behavior. For surfaces away from horizons in the emergent gravity program the first law fails (except for spherically symmetric scenarios), thus undermining the key thermodynamic assumption of this program.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © The Author(s) 2018 |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Computer Science (York) |
Depositing User: | Pure (York) |
Date Deposited: | 30 Jul 2018 14:10 |
Last Modified: | 16 Oct 2024 14:57 |
Published Version: | https://doi.org/10.1038/s41467-018-05433-9 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1038/s41467-018-05433-9 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:133973 |
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