Thermodynamics for the k-essence Emergent Reissner-Nordstrom-de Sitter Spacetime
| Autor: | Bivash Majumder, Goutam Manna, Ashoke Das |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Physics
Spacetime 010308 nuclear & particles physics Scalar (mathematics) Degrees of freedom (physics and chemistry) FOS: Physical sciences General Physics and Astronomy General Relativity and Quantum Cosmology (gr-qc) Cosmological constant 01 natural sciences General Relativity and Quantum Cosmology Black hole De Sitter universe 0103 physical sciences Dark energy 010306 general physics Scalar field Mathematical physics |
| Popis: | The {\bf k-}essence emergent Reissner-Nordstrom-de Sitter spacetime has exactly mapped on to the Robinson-Trautman (RT) type spacetime with cosmological constant $\L$ for certain configuration of {\bf k-}essence scalar field. Theoretically, we evaluated that the thermodynamical quantities for the RT type emergent black hole is different from the usual one in the presence of kinetic energy of the {\bf k-}essence scalar field i.e., the dark energy density. We restrict ourselves into the fact that the dark energy density (K) is to be unity, then the effective temperature and pressure both are negative for the RT type emergent black hole which implies that the system is thermodynamically unstable when the charge $Q\neq 0$ and the emergent spacetime is only dark energy dominated and it does not radiate when $Q=0$. The thermodynamically unstable situation is physically plausible only when we consider spin degrees of freedom of a system. We have made this analysis in the context of dark energy in an emergent gravity scenario having {\bf k-}essence scalar fields $\phi$ with a Dirac-Born-Infeld type lagrangian. The scalar field also satisfies the emergent equation of motion at $r\rightarrow\infty$. Comment: 7 pages, Accepted from EPJ Plus |
| Databáze: | OpenAIRE |
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