Thermodynamics of k-essence
| dc.creator | Bilic, Neven | |
| dc.date | 2008-06-03 | |
| dc.date | 2008-11-14 | |
| dc.date.accessioned | 2026-07-07T12:14:39Z | |
| dc.date.available | 2026-07-07T12:14:39Z | |
| dc.description | We discuss thermodynamic properties of dark energy using the formalism of field theory at finite temperature. In particular, we apply our formalism to a purely kinetic type of k-essence. We show quite generally that the entropy associated with dark-energy is always equal or greater than zero. Hence, contrary to often stated claims, a violation of the null energy condition (phantom dark energy) does not necessarily yield a negative entropy. In addition, we find that the thermal fluctuations of a k-essence field may be represented by a free boson gas with an effective number of degrees of freedom equal to c_s^{-3}. | |
| dc.description | 17 pages, minor changes, typos corrected, a comment on causality and speed of sound added, references added | |
| dc.identifier | https://arxiv.org/abs/0806.0642 | |
| dc.identifier | http://arxiv.org/abs/0806.0642 | |
| dc.identifier | Phys.Rev.D78:105012,2008 | |
| dc.identifier | doi:10.1103/PhysRevD.78.105012 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/211265 | |
| dc.subject | General Relativity and Quantum Cosmology | |
| dc.subject | Astrophysics | |
| dc.subject | High Energy Physics - Theory | |
| dc.title | Thermodynamics of k-essence | |
| dc.type | text |