دورية أكاديمية
Unified dark energy thermodynamics: varying w and the ?1-crossing.
العنوان: | Unified dark energy thermodynamics: varying w and the ?1-crossing. |
---|---|
المؤلفون: | Emmanuel N Saridakis, Pedro F Gonzalez, Diaz and, Carmen L Siguenza |
المصدر: | Classical & Quantum Gravity. Aug2009, Vol. 26 Issue 16, p165003-165003. 1p. |
مصطلحات موضوعية: | *THERMODYNAMICS, *DARK energy, *EQUATIONS of state, *TEMPERATURE, *DENSITY, *PHASE transitions, *ENTROPY |
مستخلص: | We investigate, in a unified and general way, the thermodynamic properties of dark energy with an arbitrary, varying equation-of-state parameter w(a). We find that all quantities are well defined and regular for every w(a), including the [?]1-crossing, with the temperature being negative in the phantom regime (w(a) [?]1). The density and entropy are always positive while the chemical potential can be arbitrary. At the [?]1-crossing, both temperature and chemical potential are zero. The temperature negativity can only be interpreted in the quantum framework. The regular behavior of all quantities at the [?]1-crossing leads to the conclusion that such a crossing does not correspond to a phase transition, but rather to a smooth crossover. [ABSTRACT FROM AUTHOR] |
قاعدة البيانات: | Academic Search Index |
كن أول من يترك تعليقا!