RT Journal Article
T1 Constant roll inflation in multifield models
A1 Guerrero Román, Mercedes
A1 Rubiera García, Diego
A1 Saez-Chillon Gomez, Diego
AB Constant roll inflation is analyzed in the presence of multiscalar fields which are assumed to be described by a constant roll rate each. The different cases are studied and the corresponding potentials are reconstructed. The exact solutions are obtained, which show a similar behavior to the single scalar field model. For one of the cases analyzed in the paper, the so-called adiabatic field also constantly roll(s) while entropy perturbations become null, while the second case may lead to nonadiabatic perturbations. Both cases can fit the Planck data well by assuming the appropriate values for the free parameters of the models.
PB Amer Physical Soc
SN 2470-0010
YR 2020
FD 2020-12-16
LK https://hdl.handle.net/20.500.14352/7744
UL https://hdl.handle.net/20.500.14352/7744
LA eng
NO © 2020 American Physical Society.M. G. is funded by the predoctoral Contract No. 2018-T1/TIC-10431. D. R. G. is funded by the Atraccion de Talento Investigador programme of the Comunidad de Madrid (Spain) No. 2018-T1/TIC-10431, and acknowledges further support from the Ministerio de Ciencia, Innovacion y Universidades (Spain) Project No. PID2019-108485 GB-I00/AEI/10.13039/501100011033, the Fundacao para a Ciencia e a Tecnologia (FCT, Portugal) research projects No. PTDC/FIS-OUT/29048/2017 and No. PTDC/FIS-PAR/31938/2017, the Projects No. FIS2017-84440-C2-1-P (MINECO/FEDER, EU) and No. H2020-MSCA-RISE-2017, Grant No. FunFiCO-777740 and the Edital 006/2018 PRONEX (FAPESQ-PB/CNPQ, Brazil) Grant No. 0015/2019. D. S-C. G is funded by the University of Valladolid (Spain) and by the program MOVILIDAD INVESTIGADORES UVa-BANCO SANTANDER 2020, and thanks the Department of Theoretical Physics and IPARCOS at Complutense University of Madrid for their hospitality while doing this work. This article is based upon work from COST Actions CA15117 and CA18108, supported by COST (European Cooperation in Science and Technology).
NO Unión Europea. Horizonte 2020
NO Ministerio de Economía y Competitividad (MINECO)/FEDER
NO Ministerio de Ciencia e Innovación (MICINN)
NO Comunidad de Madrid
NO Fundação para a Ciência e a Tecnologia (FCT)
DS Docta Complutense
RD 8 abr 2025