Rights statement: © 2018 American Physical Society
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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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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 -