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- W4307207890 abstract "At momenta much higher than the Hubble scale, the cosmological expansion can be thought of as a weak gravitational field. We consider QFT in a particularly convenient set of coordinates that makes this manifest, so that, for those high momenta, the effects of the cosmological expansion can be dealt with using the standard tools of perturbation theory in Minkwoski space. In this way, we re-derive standard results of QFT in a cosmological background, such as mode-stretching and gravitational particle production. We discuss the implications of our results for the trans-Planckian problem." @default.
- W4307207890 created "2022-10-30" @default.
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- W4307207890 date "2022-10-20" @default.
- W4307207890 modified "2023-09-23" @default.
- W4307207890 title "Cosmology as a weak gravitational field and the trans-Planckian problem" @default.
- W4307207890 doi "https://doi.org/10.48550/arxiv.2210.11508" @default.
- W4307207890 hasPublicationYear "2022" @default.
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