التفاصيل البيبلوغرافية
| 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] |
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| قاعدة البيانات: |
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