Thermodynamical Aspects of Modified Holographic Dark Energy Model
| Autor: | Yi Zhang, Hui Li |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Physics
DGP model Physics and Astronomy (miscellaneous) media_common.quotation_subject FOS: Physical sciences Second law of thermodynamics General Relativity and Quantum Cosmology (gr-qc) Laws of thermodynamics General Relativity and Quantum Cosmology Extra dimensions Theoretical physics Dark energy Boltzmann's entropy formula Entropy (arrow of time) First law of thermodynamics media_common |
| Zdroj: | Communications in Theoretical Physics. 62:97-101 |
| ISSN: | 0253-6102 |
| DOI: | 10.1088/0253-6102/62/1/17 |
| Popis: | We investigate the unified first law and the generalized second law in a modified holographic dark energy model. The thermodynamical analysis on the apparent horizon can work and the corresponding entropy formula is extracted from the systematic algorithm. The entropy correction term depends on the extra-dimension number of the brane as expected, but the interplay between the correction term and the extra dimensions is more complicated. With the unified first law of thermodynamics well-founded, the generalized second law of thermodynamics is discussed and it's found that the second law can be violated in certain circumstances. Particularly, if the number of the extra dimensions is larger than one, the generalized law of thermodynamics is always satisfied; otherwise, the validity of the second law can only be guaranteed with the Hubble radius greatly smaller than the crossover scale $r_c$ of the $5$-dimensional DGP model. 10 pages |
| Databáze: | OpenAIRE |
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