Results 111 to 120 of about 550,111 (273)
Tachyon field inflation in the light of BICEP2 [PDF]
Phys. Rev. D 90 (2014) 043522, 2014 We study tachyon field inflation in the light of the Planck+WMAP+BICEP2+BAO joint data. While the minimally coupled tachyon field inflation is consistent with the Planck2013 data, it is not confirmed by the Planck+WMAP+BICEP2+BAO dataset. However, a nonminimally coupled tachyon field inflation is consistent with this joint dataset.
arxiv +1 more source
Unity of Cosmological Inflation Attractors
Physical Review Letters, 2015 Recently, several broad classes of inflationary models have been discovered whose cosmological predictions, in excellent agreement with Planck, are stable with respect to significant modifications of the inflaton potential. Some classes of models are based on a nonminimal coupling to gravity. These models, which we call ξ attractors, describe universal
Renata Kallosh +3 more
openaire +4 more sources
Onset of inflation in inhomogeneous cosmology [PDF]
Physical Review D, 1997 We study how the initial inhomogeneities of the universe affect the onset of inflation in the closed universe. We consider the model of a chaotic inflation which is driven by a massive scalar field. In order to construct an inhomogeneous universe model, we use the long wavelength approximation ( the gradient expansion method ). We show the condition of
Osamu Iguchi, Hideki Ishihara
openaire +3 more sources
A New Hilbert's Hotel Argument Against Past‐Eternalism
Analytic Philosophy, EarlyView.ABSTRACT This paper offers a new formulation of the “Hilbert's Hotel Argument” (HHA) which is superior to existing formulations because it (1) demonstrates that HH is logically impossible in the concrete world, (2) takes into account the need to consider the assumptions of HHA, and (3) offers a reply to an important objection concerning the validity of
Andrew Ter Ern Loke, Eli Haitov
wiley +1 more source
Map of Jupiter's Radiation Environment From Juno's In‐Situ Observations
Journal of Geophysical Research: Planets, Volume 130, Issue 3, March 2025.Abstract Since its orbit insertion on 4 July 2016, the Juno spacecraft has orbited Jupiter in a highly elliptical, polar orbit. With every orbit, Juno's line of apsides migrates, increasing the angle relative to the Jovian equator. Therefore, the spacecraft traverses across the inner regions of the radiation belt, where energetic particles are trapped.
M. Herceg +9 more
wiley +1 more source
Physics Letters B, 2022 In Chain Inflation the universe tunnels along a series of false vacua of ever-decreasing energy. The main goal of this paper is to embed Chain Inflation in high energy fundamental physics.
Katherine Freese +2 more
doaj
Entropy, 2012 We develop the general reconstruction scheme in two scalar model. The quintom-like theory which may describe (different) non-singular Little Rip or de Sitter cosmology is reconstructed.
Yusaku Ito +2 more
doaj +1 more source
, 2012 The very basics of cosmological inflation are discussed. We derive the equations of motion for the inflaton field, introduce the slow-roll parameters, and present the computation of the inflationary perturbations and their connection to the temperature fluctuations of the cosmic microwave background.
openaire +2 more sources
Cosmology: The test of inflation [PDF]
Nature, 2009 As the launch of the Planck spacecraft approaches, Eric Hand investigates what the mission could mean for the predominant theory of the moments after the Big Bang.
openaire +2 more sources
Crack Development Inside and Around Lunar Lava Tubes
Journal of Geophysical Research: Planets, Volume 130, Issue 3, March 2025.Abstract Evidence shows that lava tubes on the Moon, which constitute intriguing targets for exploration and long‐term habitation, could be much larger than terrestrial tubes. However, existing observation strategies cannot confidently constrain the exact dimensions of lunar tubes in anticipation of in situ exploration.
E. A. Williams, L. G. J. Montési
wiley +1 more source