Holographic heat engines
By Clifford V. Johnson. 2014
372 citations recorded by the source corpus.
It is shown that in theories of gravity where the cosmological constant is considered a thermodynamic variable, it is natural to use black holes as heat engines. Two examples are presented in detail using AdS charged black holes as the working substance. We notice that for static black holes, the maximally efficient traditional Carnot engine is also a Stirling engine. The case of negative cosmological constant supplies a natural realization of these engines in terms of the field theory description of the fluids to which they are holographically dual. We first propose a precise picture of how the traditional thermodynamic dictionary of holography is extended when the cosmological constant is dynamical and then conjecture that the engine cycles can be performed by using renormalization group flow. We speculate about the existence of a natural dual field theory counterpart to the gravitational thermodynamic volume.
Subfields: Astronomy and Astrophysics, Atomic and Molecular Physics, and Optics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/d80776980880cfde5b6184b9de949a173775433d
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Citations in the corpus
- Black hole chemistry: thermodynamics with Lambda (2016, background): “As such, the aforementioned examples of heat engines that go around a loop in the P − V plane are, from the viewpoint of the boundary, going around the space of field theories rather than staying within one particular field theory [184, 192].”
- Holographic entanglement entropy and the extended phase structure of STU black holes (2015, background): “However, the pressure and volume appearing in the extended thermodynamics are not identified with the pressure and volume of the dual field theory, instead, they are interpreted as (non-thermodynamic) dynamical variables in the space of field theories [35].”
- Regular Black Holes: A Short Topic Review (2023, background): “The first holographic heat enginewas proposed [203] by Johnson, where BHs act as a working substance.”
- Noether charge, black hole volume, and complexity (2016, background): “A number of relativists [5–9], and more recently high energy physicists [10], have suggested that the pressure should be identified as the cosmological constant.”