Results 91 to 100 of about 973 (226)

Counterterms in cosmological perturbation theory [PDF]

Physical Review D, 2014
8 pages; The version submitted to (and accepted by ...
openaire   +2 more sources

Reheating in a modified teleparallel model of inflation

European Physical Journal C: Particles and Fields, 2019
We study the cosmological inflation and reheating in a teleparallel model of gravity. Reheating is assumed to be due to the decay of a scalar field to radiation during its rapid oscillation.
Parviz Goodarzi, H. Mohseni Sadjadi
doaj   +1 more source

Leibniz on Compossibility: Towards a Neo‐Logical Interpretation

Theoria, EarlyView.
ABSTRACT Leibniz's concept of compossibility explains why not all possible substances are actualised, thereby resisting Spinoza's necessitarianism. Yet, the precise basis of incompossibility remains unresolved. The influential ‘logical’ interpretation—exemplified by the Hintikka–D'Agostino thesis—locates incompossibility in contradictions among ...
Jun Young Kim
wiley   +1 more source

Cosmic anisotropy with reduced relativistic gas

European Physical Journal C: Particles and Fields, 2018
The dynamics of cosmological anisotropies is investigated for Bianchi type I universe filled by a relativistic matter represented by the reduced relativistic gas model (RRG), with equation of state interpolating between radiation and matter.
Simpliciano Castardelli dos Reis, Ilya L. Shapiro   +1 more
doaj   +1 more source

Spaceborne and spaceborn: Physiological aspects of pregnancy and birth during interplanetary flight

Experimental Physiology, EarlyView.
Abstract Crewed interplanetary return missions that are on the planning horizon will take years, more than enough time for initiation and completion of a pregnancy. Pregnancy is viewed as a sequence of processes – fertilization, blastocyst formation, implantation, gastrulation, placentation, organogenesis, gross morphogenesis, birth and neonatal ...
Arun V. Holden
wiley   +1 more source

Cosmological perturbations in flux compactifications [PDF]

Journal of Cosmology and Astroparticle Physics, 2005
Kaluza-Klein compactifications with four-dimensional inflationary geometry combine the attractive idea of higher dimensional models with the attempt to incorporate four-dimensional early-time or late-time cosmology. We analyze the mass spectrum of cosmological perturbations around such compactifications, including the scalar, vector, and tensor sector.
openaire   +2 more sources

The study of lossy compressive method with different interpolation for holographic reconstruction in optical scanning holography

上海师范大学学报. 自然科学版, 2015
We study the cosmological inflation models driven by the rolling tachyon field which has a Born-Infeld-type action.We drive the Hamilton-Jacobi equation for the cosmological dynamics of tachyon inflation and the mode equations for the scalar and tensor ...
HU Zhijuan, YAN Aimin
doaj   +1 more source

Semiclassical approximations to cosmological perturbations [PDF]

, 2007
Ph.D.
openaire   +2 more sources

Cosmological perturbations in conformal gravity [PDF]

Physical Review D, 2012
43 pages. Final version. To appear in Phys.
openaire   +2 more sources

Signature of f(R) gravity via Lemaître–Tolman–Bondi inhomogeneous perturbations

European Physical Journal C: Particles and Fields
We analyze inhomogeneous cosmological models in the local Universe, described by the Lemaître–Tolman–Bondi (LTB) metric and developed using linear perturbation theory on a homogeneous and isotropic Universe background. Focusing on the different evolution
Tiziano Schiavone, Giovanni Montani
doaj   +1 more source