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 |
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asx Academic Search Index 43794107 1093 6 Academic Journal academicJournal 1093.48913574219 |
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https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&scope=site&db=asx&AN=43794107&custid=s6537998&authtype=sso |
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