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Gauge - invariant fluctuations of the metric in stochastic inflation

Mauricio Bellini
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Abstract

I derive the stochastic equation for the perturbations of the metric for a gauge - invariant energy - momemtum - tensor (EMT) in stochastic inflation. A quantization for the field that describes the gauge - invariant perturbations for the metric is developed. In a power - law expansion for the universe the amplitude for these perturbations on a background metric could be very important in the infrared sector.

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Mauricio Bellini. 2000-01-07. Gauge - invariant fluctuations of the metric in stochastic inflation. https://doi.org/10.1103/physrevd.61.107301

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