On cosmological implications of gravitational trace anomaly (CROSBI ID 133727)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Bilić, Neven ; Guberina, Branko ; Horvat, Raul ; Nikolić, Hrvoje ; Štefančić, Hrvoje
engleski
On cosmological implications of gravitational trace anomaly
We study the infrared effective theory of gravity that stems from the quantum trace anomaly. Quantum fluctuations of the metric induce running of the cosmological constant and the Newton constant at cosmological scales. By imposing the generalized Bianchi identity we obtain a prediction for the scale dependence of the dark matter and dark energy densities in terms of the parameters of the underlying conformal theory. For certain values of the model parameters the dark energy equation of state and the observed spectral index of the primordial density fluctuations can be simultaneously reproduced.
gravitational trace anomaly ; running cosmological constant ; spectral index
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Podaci o izdanju
657 (4-5)
2007.
232-237
objavljeno
0370-2693
1873-2445
10.1016/j.physletb.2007.09.067