Conformally related early universe models can be told apart by the location of frame-invariant variables built from the time variation of particle and Planck masses.
Adiabatic Spectra During Slowly Evolving
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abstract
In general, for single field, the scale invariant spectrum of curvature perturbation can be given by either its constant mode or its increasing mode. We show that during slowly expanding or contracting, the spectrum of curvature perturbation given by its increasing mode can be scale invariance. The perturbation mode can be naturally extended out of horizon, and the amplitude of perturbation is consistent with the observations. We briefly discuss the implement of this scenario.
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gr-qc 1years
2019 1verdicts
CONDITIONAL 1representative citing papers
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Towards degeneracy breaking of early universe models
Conformally related early universe models can be told apart by the location of frame-invariant variables built from the time variation of particle and Planck masses.