Mode Generating Mechanism in Inflation with Cutoff

By A. Kempf. 2000

175 citations recorded by the source corpus.

In most inflationary models, space-time inflated to the extent that modes of cosmological size originated as modes of wavelengths at least several orders of magnitude smaller than the Planck length. Recent studies confirmed that, therefore, inflationary predictions for the cosmic microwave background perturbations are generally sensitive to what is assumed about the Planck scale. Here, we propose a framework for field theories on curved backgrounds with a plausible type of ultraviolet cutoff. We find an explicit mechanism by which during cosmic expansion new (comoving) modes are generated continuously. Our results allow the numerical calculation of a prediction for the CMB perturbation spectrum.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics, Statistical and Nonlinear Physics

View Paper: https://www.semanticscholar.org/paper/16e6c7ddde5fbd7047db00a852ed1b08912e792b

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Citations in the corpus

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Minimal Length Scale Scenarios for Quantum Gravity (2012, background): “Therefore, it was proposed [180, 144] that this problem too might be cured by implementing a minimum length uncertainty principle into inflationary cosmology.”
Inflation, holography, and the choice of vacuum in de Sitter space (2002, background): “In several recent works the rationality of this assumption has been questioned, [2-26].”
Analogue Gravity (2005, methodology): “Further afield, the trans-Planckian problem also reared its head in the context of cosmological inflation, and analogue model ideas previously applied to Hawking radiation were reused in that context [207, 273].”