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Hint for quintessence-like scalars from holographic dark energy


Guberina, Branko; Horvat, Raul; Štefančić, Hrvoje
Hint for quintessence-like scalars from holographic dark energy // Journal of cosmology and astroparticle physics, 05 (2005), 001-007 (međunarodna recenzija, članak, znanstveni)


Naslov
Hint for quintessence-like scalars from holographic dark energy

Autori
Guberina, Branko ; Horvat, Raul ; Štefančić, Hrvoje

Izvornik
Journal of cosmology and astroparticle physics (1475-7516) 05 (2005); 001-007

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

Ključne riječi
Dark energy theory; quantum gravity phenomenolgy; quantum field theory on curved space

Sažetak
We use the generalized holographic dark energy model, in which both the cosmological constant (CC) and Newton's constant G_N are scale dependent, to set constraints on the renormalization-group (RG) evolution of both quantities phrased within quantum field theory (QFT) in a curved background. Considering the case in which the energy-momentum tensor of ordinary matter stays individually conserved, we show from the holographic dark energy requirement that the RG laws for the CC and G_N are completely determined in terms of the lowest part of the particle spectrum of an underlying QFT. From simple arguments one can then infer that the lowest-mass fields should have a Compton wavelength comparable with the size of the current Hubble horizon. Hence, although the models with variable CC (or with both the CC and the G_N varying) are known to lead to successful cosmologies without introducing a new light degree of freedom, we nonetheless find that holography actually brings us back to the quintessence proposal. An advantage of having two different components of the vacuum energy in the cosmological setting is also briefly mentioned.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
0098002
0098011

Ustanove
Institut "Ruđer Bošković", Zagreb

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus