Self-tuning vacuum variable and cosmological constant

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A spacetime-independent variable is introduced which characterizes a Lorentz-invariant self-sustained quantum vacuum. For a perfect (Lorentz-invariant) quantum vacuum, the self-tuning of this variable nullifies the effective energy density which enters the low-energy gravitational field equations. The observed small but nonzero value of the cosmological constant may then be explained as corresponding to the effective energy density of an imperfect quantum vacuum (perturbed by, e.g., the presence of thermal matter).

Yksityiskohdat

AlkuperäiskieliEnglanti
Artikkeli085015
Sivut1-14
JulkaisuPhysical Review D
Vuosikerta77
Numero8
TilaJulkaistu - 2008
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

    Tutkimusalat

  • cosmological constant, self-sustained quantum vacuum

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