Results 1 to 10 of about 180,985 (262)
Relaxing the TCC bound on inflationary cosmology? [PDF]
European Physical Journal C: Particles and Fields, 2020 We demonstrate that the strict upper bounds on the energy scale of inflation and on the tensor-to-scalar ratio can be somewhat relaxed if we assume that – after an initial period of slow rolling when scales probed today in CMB experiments exit the Hubble
Vahid Kamali, Robert Brandenberger
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Holographic cosmology solutions of problems with pre-inflationary cosmology [PDF]
Journal of High Energy Physics, 2020 In this paper we describe in detail how to solve the problems of pre-inflationary cosmology within the holographic cosmology model of McFadden and Skenderis [1].
Horatiu Nastase
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Quantum entanglement in inflationary cosmology [PDF]
European Physical Journal C: Particles and Fields, 2020 We investigate the time-dependent entanglement entropy in the AdS space with a dS boundary which represents an expanding spacetime. On this time-dependent spacetime, we show that the Ryu–Takayanagi formula, which is usually valid in the static spacetime,
Seoktae Koh +3 more
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Epistemic Justification and Methodological Luck in Inflationary Cosmology. [PDF]
Br J Philos Sci, 2019 I present a recent historical case from cosmology—the story of inflationary cosmology—and on its basis argue that solving explanatory problems is a reliable method for making progress in science.
McCoy CD.
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The method of generating functions in exact scalar field inflationary cosmology [PDF]
European Physical Journal C: Particles and Fields, 2018 The construction of exact solutions in scalar field inflationary cosmology is of growing interest. In this work, we review the results which have been obtained with the help of one of the most effective methods, viz., the method of generating functions ...
Sergey V. Chervon +2 more
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Pre-inflationary dynamics of Starobinsky inflation and its generization in loop quantum Brans-Dicke cosmology [PDF]
Journal of Cosmology and Astroparticle Physics, 2018 Recently, the nonperturbative quantization scheme of loop quantum gravity has been extended to the Brans-Dicke theory and the corresponding loop quantum Brans-Dicke cosmology has been derived, which provides an essential platform to explore inflationary ...
Wei-Jian Jin, Yong-Liang Ma, Tao Zhu
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Trans-Planckian issues for inflationary cosmology [PDF]
, 2012 The accelerated expansion of space during the cosmological inflation period leads to trans-Planckian issues which need to be addressed. Most importantly, the physical wavelength of fluctuations which are studied at the present time by means of ...
R. Brandenberger, Jérôme Martin
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Ultracompact Minihalos as Probes of Inflationary Cosmology. [PDF]
Physical Review Letters, 2015 Cosmological inflation generates primordial density perturbations on all scales, including those far too small to contribute to the cosmic microwave background. At these scales, isolated ultracompact minihalos of dark matter can form well before standard
G. Aslanyan +7 more
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Inflationary Cosmology in the Modified $f(R, T)$ Gravity [PDF]
, 2022 In this work, we study the inflationary cosmology in modified gravity theory f ( R, T ) = R +2 λT ( λ is the modified gravity parameter) with three distinct class of inflation potentials (i) φ p e − αφ , (ii) (1 − φ p ) e − αφ and (iii) αφ 2 1+ αφ 2 where α ,
Ashmita, Payel Sarkar, P. Das
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Is a loopy and noncommutative early Universe viable?
Physics Letters B, 2023 We conduct a (pre-)inflationary dynamics study of the chaotic quadratic potential within the framework of a simple noncommutative extension of effective loop quantum cosmology put forward recently.
Luis Rey Díaz-Barrón +3 more
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