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Instant preheating in quintessential inflation with α-attractors

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Instant preheating in quintessential inflation with α-attractors. / Dimopoulos, Konstantinos; Donaldson Wood, Leonora; Owen, Charlotte.

In: Physical Review D, Vol. 97, No. 6, 063525, 23.03.2018.

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Dimopoulos, Konstantinos ; Donaldson Wood, Leonora ; Owen, Charlotte. / Instant preheating in quintessential inflation with α-attractors. In: Physical Review D. 2018 ; Vol. 97, No. 6.

Bibtex

@article{ff4bd5b09db4430999edd4355c652912,
title = "Instant preheating in quintessential inflation with α-attractors",
abstract = "We investigate a compelling model of quintessential inflation in the context of α-attractors, which naturally result in a scalar potential featuring two flat regions; the inflationary plateau and the quintessential tail. The “asymptotic freedom” of α-attractors, near the kinetic poles, suppresses radiative corrections and interactions, which would otherwise threaten to lift the flatness of the quintessential tail and cause a 5th force problem respectively. Since this is a nonoscillatory inflation model, we reheat the Universe through instant preheating. The parameter space is constrained by both inflation and dark energy requirements. We find an excellent correlation between the inflationary observables and model predictions, in agreement with the α-attractors setup. We also obtain successful quintessence for natural values of the parameters. Ourmodel predicts potentially sizeable tensor perturbations (at the level of 1%) and a slightly varying equation of state for dark energy, to be probed in the near future.",
keywords = "inflationary universe, preheating",
author = "Konstantinos Dimopoulos and {Donaldson Wood}, Leonora and Charlotte Owen",
note = "{\textcopyright} 2018 American Physical Society",
year = "2018",
month = mar,
day = "23",
doi = "10.1103/PhysRevD.97.063525",
language = "English",
volume = "97",
journal = "Physical Review D",
issn = "1550-7998",
publisher = "American Physical Society",
number = "6",

}

RIS

TY - JOUR

T1 - Instant preheating in quintessential inflation with α-attractors

AU - Dimopoulos, Konstantinos

AU - Donaldson Wood, Leonora

AU - Owen, Charlotte

N1 - © 2018 American Physical Society

PY - 2018/3/23

Y1 - 2018/3/23

N2 - We investigate a compelling model of quintessential inflation in the context of α-attractors, which naturally result in a scalar potential featuring two flat regions; the inflationary plateau and the quintessential tail. The “asymptotic freedom” of α-attractors, near the kinetic poles, suppresses radiative corrections and interactions, which would otherwise threaten to lift the flatness of the quintessential tail and cause a 5th force problem respectively. Since this is a nonoscillatory inflation model, we reheat the Universe through instant preheating. The parameter space is constrained by both inflation and dark energy requirements. We find an excellent correlation between the inflationary observables and model predictions, in agreement with the α-attractors setup. We also obtain successful quintessence for natural values of the parameters. Ourmodel predicts potentially sizeable tensor perturbations (at the level of 1%) and a slightly varying equation of state for dark energy, to be probed in the near future.

AB - We investigate a compelling model of quintessential inflation in the context of α-attractors, which naturally result in a scalar potential featuring two flat regions; the inflationary plateau and the quintessential tail. The “asymptotic freedom” of α-attractors, near the kinetic poles, suppresses radiative corrections and interactions, which would otherwise threaten to lift the flatness of the quintessential tail and cause a 5th force problem respectively. Since this is a nonoscillatory inflation model, we reheat the Universe through instant preheating. The parameter space is constrained by both inflation and dark energy requirements. We find an excellent correlation between the inflationary observables and model predictions, in agreement with the α-attractors setup. We also obtain successful quintessence for natural values of the parameters. Ourmodel predicts potentially sizeable tensor perturbations (at the level of 1%) and a slightly varying equation of state for dark energy, to be probed in the near future.

KW - inflationary universe

KW - preheating

U2 - 10.1103/PhysRevD.97.063525

DO - 10.1103/PhysRevD.97.063525

M3 - Journal article

VL - 97

JO - Physical Review D

JF - Physical Review D

SN - 1550-7998

IS - 6

M1 - 063525

ER -