Zobrazeno 1 - 10
of 115
pro vyhledávání: '"Das, Suratna"'
Autor:
Kumar, Umang, Das, Suratna
Publikováno v:
JCAP 10 (2024) 058
A thorough MCMC analysis of any inflationary model against the current cosmological data is essential for assessing the validity of such a model as a viable inflationary model. Warm Inflation, producing both thermal and quantum fluctuations, yield a
Externí odkaz:
http://arxiv.org/abs/2407.06032
Publikováno v:
Phys. Rev. D 110 (2024) 063536
Departing from standard slow-roll conditions is one way of putting the inflationary paradigm to test, and constraining the dynamics of the inflaton field with a constant-rate of roll of the inflaton field, a.k.a. the constant-roll scenario, is one wa
Externí odkaz:
http://arxiv.org/abs/2406.00340
Publikováno v:
Phys. Rev. D 109 (2024) 023501
Slow-roll of the inflaton field defines the standard dynamics of the inflationary epoch. However, the inflationary system deviates from slow-roll when it encounters an extremely flat region of the inflaton potential, and enters a phase dubbed Ultra s
Externí odkaz:
http://arxiv.org/abs/2308.12704
Publikováno v:
Phys. Rev. D 108 (2023) 083517
A dynamical system analysis is performed for a model of dissipative quintessential inflation realizing warm inflation at early primordial times and dissipative interations in the dark sector at late times. The construction makes use of a generalized
Externí odkaz:
http://arxiv.org/abs/2306.09369
Autor:
Das, Suratna, Ramos, Rudnei O.
Publikováno v:
Universe 9, 76 (2023)
Next generation of cosmological observations are expected to improve the measurements of several quantities connected to the primordial inflation in the early Universe. These quantities include for example improved measurements for the spectral index
Externí odkaz:
http://arxiv.org/abs/2212.13914
Autor:
Das, Suratna, Ramos, Rudnei O.
Publikováno v:
Phys. Rev. D 102, 103522 (2020)
The runaway potentials, which do not possess any critical points, are viable potentials which befit the recently proposed de Sitter swampland conjecture very well. In this work, we embed such potentials in the warm inflation scenario motivated by qua
Externí odkaz:
http://arxiv.org/abs/2007.15268
Autor:
Das, Suratna
Publikováno v:
Phys. Rev. D 102, 061303 (2020)
Pre-inflationary dynamics is known to have left observable imprints via the varied dynamics of the inflaton and the graviton fields during those epochs. It is highlighted here that other particle degrees of freedom, too, are capable of leaving their
Externí odkaz:
http://arxiv.org/abs/2005.07527
Autor:
Das, Suratna, Ramos, Rudnei O.
Publikováno v:
Phys. Rev. D 103, 123520 (2021)
A seemingly simple question, how does warm inflation exit gracefully?, has a more complex answer than in a cold paradigm. It has been highlighted here that whether warm inflation exits gracefully depends on three independent choices: The form of the
Externí odkaz:
http://arxiv.org/abs/2005.01122
Publikováno v:
Phys. Rev. D 101, 103529 (2020)
Warm inflation has been noted previously as a possible way to implement inflationary models compatible with the dS swampland bounds. But often in these discussions the heat bath dynamics is kept largely unspecified. We point out that the recently int
Externí odkaz:
http://arxiv.org/abs/1911.00323
Autor:
Das, Suratna
Publikováno v:
Physics of the Dark Universe, 27(2020), 100432
In this short note, we pointed out that Warm inflationary scenario remains to be favoured over its cold counterpart by the recently proposed conjectures, which aim to overrule de Sitter like constructions in String Landscapes. On the other hand, the
Externí odkaz:
http://arxiv.org/abs/1910.02147