Naslov
Thermodynamics of k-essence

Autori
Bilić , Neven

Izvornik
Physical review. D, Particles, fields, gravitation, and cosmology (1550-7998) 78 (2008), 10; 105012, 9

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
k-essence ; entropy ; dark energy

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA