Variable cosmological constant as a Planck scale effect

@article{Shapiro2003VariableCC,
  title={Variable cosmological constant as a Planck scale effect},
  author={Ilya L. Shapiro and Joan Sol{\`a} and Cristina Espa{\~n}a-Bonet and Pilar Ruiz-Lapuente},
  journal={Physics Letters B},
  year={2003},
  volume={574},
  pages={149-155}
}
Abstract We construct a semiclassical Friedmann–Lemaitre–Robertson–Walker (FLRW) cosmological model assuming a running cosmological constant (CC). It turns out that the CC becomes variable at arbitrarily low energies due to the remnant quantum effects of the heaviest particles, e.g., the Planck scale physics. These effects are universal in the sense that they lead to a low-energy structure common to a large class of high-energy theories. Remarkably, the uncertainty concerning the unknown high… Expand

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References

SHOWING 1-10 OF 51 REFERENCES
Testing the running of the cosmological constant with type Ia supernovae at high z
Within the quantum field theory context the idea of a `cosmological constant' (CC) evolving with time looks quite natural as it just reflects the change of the vacuum energy with the typical energyExpand
Adjusting the cosmological constant dynamically: Cosmons and a new force weaker than gravity
We argue that the vamshmg of the cosmological constant obtains as a result of the dynamics of a new field-the cosmon-which is the Goldstone boson of dilatation lnvanance, assumed to be brokenExpand
Scaling behavior of the cosmological constant and the possible existence of new forces and new light degrees of freedom
Abstract A large value of the cosmological constant (CC) is induced in the Standard Model (SM) of Elementary Particle Physics because of Spontaneous Symmetry Breaking. To provide a small value of theExpand
The Cosmological Constant and Dark Energy
Physics invites the idea that space contains energy whose gravitational effect approximates that of Einstein's cosmological constant, Lambda: nowadays the concept is termed dark energy orExpand
Cosmology of the Planck era from a renormalization group for quantum gravity
Homogeneous and isotropic cosmologies of the Planck era before the classical Einstein equations become valid are studied taking quantum gravitational effects into account. The cosmological evolutionExpand
Renormalization group running of the cosmological constant and its implication for the Higgs boson mass in the standard model
AbstractThe renormalization-group equation for the zero-point energies associated with vacuum fluctuationsof massive fields from the Standard Model is examined. Our main observation is that at anyExpand
Renormalization-group running of the cosmological constant and the fate of the universe
For a generic quantum field theory we study the role played by the renormalization-group (RG) running of the cosmological constant (CC) in determining the ultimate fate of the universe. We considerExpand
Cosmological constant—the weight of the vacuum
Recent cosmological observations suggest the existence ofa positive cosmological constantwith the magnitude � (G˝=c 3 ) ≈ 10 −123 . This review discusses several aspects ofthe cosmological constantExpand
Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
We present spectral and photometric observations of 10 Type Ia supernovae (SNe Ia) in the redshift range 0.16 " z " 0.62. The luminosity distances of these objects are determined by methods thatExpand
Renormalization group and decoupling in curved space
It is well known that the renormalization group equations depend on the scale where they are applied. This phenomenon is especially relevant for the massive fields in curved space, because theExpand
...
1
2
3
4
5
...