Running of scalar spectral index in multi-field inflation

Jinn Ouk Gong

doi:10.1088/1475-7516/2015/05/041

Running of scalar spectral index in multi-field inflation

Jinn Ouk Gong

Department of Science Education

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

We compute the running of the scalar spectral index in general multi-field slow-roll inflation. By incorporating explicit momentum dependence at the moment of horizon crossing, we can find the running straightforwardly. At the same time, we can distinguish the contributions from the quasi de Sitter background and the super-horizon evolution of the field fluctuations.

Original language	English
Article number	041
Journal	Journal of Cosmology and Astroparticle Physics
Volume	2015
Issue number	5
DOIs	https://doi.org/10.1088/1475-7516/2015/05/041
State	Published - 26 May 2015

Bibliographical note

Publisher Copyright:
© 2015 IOP Publishing Ltd and Sissa Medialab srl.

Keywords

cosmological perturbation theory
inflation
physics of the early universe

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10.1088/1475-7516/2015/05/041

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abstract = "We compute the running of the scalar spectral index in general multi-field slow-roll inflation. By incorporating explicit momentum dependence at the moment of horizon crossing, we can find the running straightforwardly. At the same time, we can distinguish the contributions from the quasi de Sitter background and the super-horizon evolution of the field fluctuations.",

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AB - We compute the running of the scalar spectral index in general multi-field slow-roll inflation. By incorporating explicit momentum dependence at the moment of horizon crossing, we can find the running straightforwardly. At the same time, we can distinguish the contributions from the quasi de Sitter background and the super-horizon evolution of the field fluctuations.

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Running of scalar spectral index in multi-field inflation

Abstract

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Keywords

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