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Understanding gravitational particle production in quintessential inflation
(2019-06-01)
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The diagonalization method, introduced by a group of Russian scientists at the beginning of seventies, is used to compute the energy density of superheavy massive particles produced due to a sudden phase transition from ...
Near-sphere lattices with constant nonlocal mean curvature
(2018-04)
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We are concerned with unbounded sets of RN whose boundary has constant nonlocal (or fractional) mean curvature, which we call CNMC sets. This is the equation associated to critical points of the fractional perimeter ...
a-attractors in quintessential inflation motivated by supergravity
(American Physical Society, 2021-06-15)
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An exponential kind of quintessential inflation potential motivated by supergravity is studied. This type belongs to the class of a-attractor models. The model was studied for the first time by Dimopoulos and Owen in [J. ...
Motility switching and front–back synchronisation in polarised cells
(2022-06)
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The combination of protrusions and retractions in the movement of polarized cells leads to understand the effect of possible synchronisation between the two ends of the cells. This syn- chronisation, in turn, could lead ...
Reheating via gravitational particle production in simple models of quintessence or ¿CDM Inflation
(2017-11-14)
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We have tested some simple CDM (the same test is also valid for quintessence) inflation models, imposing that they match with the recent observational data provided by the BICEP and Planck’s team and leading to a reheating ...
Inflation and late-time acceleration from a double-well potential with cosmological constant
(2016-06-01)
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A model of a universe without big bang singularity is presented, which displays an early inflationary period ending just before a phase transition to a kination epoch. The model produces enough heavy particles so as to ...
Stability problems in nonautonomous linear differential equations in infinite dimensions
(2020-06-01)
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In this paper we study the robustness of the stability in nonautonomous linear ordinary differential equations under integrally small perturbations in infinite dimensional Banach spaces. Some applications are obtained to ...
Discrepancies between observational data and theoretical forecast in single field slow roll inflation
(2016-09-09)
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The PLANCK collaboration has determined, or greatly constrained, values for the spectral parameters of the CMB radiation, namely the spectral index ns, its running as, the running of the running ßs, using a growing body ...
The spectrum of gravitational waves, their overproduction in quintessential inflation and its influence in the reheating temperature
(2020-06-01)
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One of the most important issues in an inflationary theory as standard or quintessential inflation is the mechanism to reheat the universe after the end of the inflationary period in order to match with the Hot Big Bang ...
Quintessential inflation at low reheating temperatures
(2017-11-23)
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Article.
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We have tested some simple quintessential inflation models, imposing the requirement that they match with the recent observational data provided by the BICEP and Planck team and leading to a reheating temperature, which ...