Thermodynamics of k-essence (CROSBI ID 147508)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Bilić , Neven
engleski
Thermodynamics of k-essence
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−3s.
k-essence ; entropy ; dark energy
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Podaci o izdanju
78 (10)
2008.
105012
9
objavljeno
1550-7998
1550-2368
10.1103/PhysRevD.78.105012