Suggested Topics within your search.
Suggested Topics within your search.
- Physics 1
-
381
Unified Dark Matter Scalar Field Models
Published 2010-01-01“…We analyze and review cosmological models in which the dynamics of a single scalar field accounts for a unified description of the Dark Matter and Dark Energy sectors, dubbed Unified Dark Matter (UDM) models. …”
Get full text
Article -
382
Bianchi Type-V Bulk Viscous Cosmic String in f(R,T) Gravity with Time Varying Deceleration Parameter
Published 2015-01-01“…We study the Bianchi type-V string cosmological model with bulk viscosity in f(R,T) theory of gravity by considering a special form and linearly varying deceleration parameter. …”
Get full text
Article -
383
Warm Inflation with Nonminimal Derivative Coupling
Published 2014-01-01“…We present a detailed calculation of the cosmological perturbations in this setup. We use the recent observational data from the joint data set of WMAP9 + BAO + H0 and also the Planck satellite data to constrain our model parameters for natural and chaotic inflation potentials. …”
Get full text
Article -
384
Localization of Energy-Momentum for a Black Hole Spacetime Geometry with Constant Topological Euler Density
Published 2018-01-01“…The energy is found to depend on the mass M and the charge q of the black hole, the cosmological constant Λ, and the radial coordinate r, while in both prescriptions all the momenta vanish. …”
Get full text
Article -
385
Early matter domination at colliders: Long live the glueball!
Published 2025-02-01“…In this letter we concentrate on the specific example of glueballs from a GeV-scale confining dark sector and compute the dilution of cosmological relics induced by their decay. We then show that searches for long-lived glueballs from Higgs decays test increasing values of dilution at ATLAS and CMS, CODEX-b, ANUBIS and MATHUSLA. …”
Get full text
Article -
386
Construct α′ corrected or loop corrected solutions without curvature singularities
Published 2020-01-01“…Abstract For the bosonic gravi-dilaton system, we provide systematical approaches to construct non-perturbative string cosmological solutions without curvature singularities, which can match the perturbative solution to any order in α′ expansion. …”
Get full text
Article -
387
Wigner function method for the Gibbons–Hawking and the Unruh effect
Published 2024-11-01“…We found excellent Planck spectra for a class of realistic cosmological models, but also strongly non–Planckian, negative Wigner functions for a standard scenario testable with laboratory analogues.…”
Get full text
Article -
388
More on the Non-Gaussianity of Perturbations in a Nonminimal Inflationary Model
Published 2018-01-01“…We study nonlinear cosmological perturbations and their possible non-Gaussian character in an extended nonminimal inflation where gravity is coupled nonminimally to both the scalar field and its derivatives. …”
Get full text
Article -
389
Thermodynamics of the substantial universe
Published 2024-06-01“…Based on thermodynamic calculations of the substantial Universe, it is shown that the cosmological theory of the Big Bang is erroneous. The thermodynamic ban on this theory makes the hypothesis of dark energy expanding the substantial Universe also erroneous. …”
Get full text
Article -
390
Sangue de Lua: reflexôes sobre espíritos e eclipses
Published 2012-07-01“…Taking this ethnographic and cinematographic experience as his starting point, the author reflects on the meaning of the eclipse for the Kuikuro, focusing on the explicit cosmological knowledge conveyed by them, on the nature of their adherence to a belief system, and on some mytho-ritual themes that, lacking a native exegesis, can only be understood through a comparative perspective.…”
Get full text
Article -
391
The Relation between the Quasi-Localized Energy-Momentum Complexes and the Thermodynamic Potential for the Schwarzschild-de Sitter Black Hole
Published 2017-01-01“…Here M is the patch between cosmological event horizon and black hole event horizon of the SdS black hole solution. …”
Get full text
Article -
392
Geometry of the Universe and Its Relation to Entropy and Information
Published 2013-01-01“…In an effort to investigate a possible relation between geometry and information, we establish a relation of the Ricci scalar in the Robertson-Walker metric of the cosmological Friedmann model to the number of information N and entropy S. …”
Get full text
Article -
393
Fractons on curved spacetime in 2 + 1 dimensions
Published 2025-01-01“…We study dipole Chern–Simons theory with and without a cosmological constant in $2+1$ dimensions. We write the theory in a second order formulation and show that this leads to a fracton gauge theory coupled to Aristotelian geometry which can also be coupled to matter. …”
Get full text
Article -
394
La part manquante du paysage
Published 2010-07-01“…In turn, the Lacandon Mayas who live in the forest transform their territory in a reflexive relationship...two cosmological, aestethical, cultural prisms are crossing the forest and redesigning its landscapes. …”
Get full text
Article -
395
Energy Conditions in a Generalized Second-Order Scalar-Tensor Gravity
Published 2013-01-01“…The study of energy conditions has many significant applications in general relativistic and cosmological contexts. This paper explores the energy conditions in the framework of the most general scalar-tensor theory with field equations involving second-order derivatives. …”
Get full text
Article -
396
La organización social de los mazahuas del Estado de México
Published 2001-01-01“…This group posits their cosmological bases on a cultural matrix dating back to pre columbian and colonial times. …”
Get full text
Article -
397
Soliton foam formation in the early Universe
Published 2025-01-01“…We find that in three-dimensional space, the nontrivial composite field structures are formed in the form of <<soliton foam>>, consisting of closed domain walls, domain walls bounded by cosmic strings, and scalar field radiation. The possible cosmological implications of the soliton foam are discussed.…”
Get full text
Article -
398
Black string solutions in Lifshitz spacetime
Published 2025-01-01“…We have shown that a new class of asymptotically Lifshitz solutions can be generated by an Einstein–Maxwell-Dilaton theory with a cosmological constant. In the limit where we recover conformal scale invariance, we retrieve the usual black string solution. …”
Get full text
Article -
399
Neutrinoless Double Beta Decay: 2015 Review
Published 2016-01-01“…Also, experimental data coming from cosmological surveys are considered and their impact on 0νββ expectations is examined.…”
Get full text
Article -
400
Modified Newtonian Dynamics: A Falsification of Cold Dark Matter
Published 2009-01-01“…This hypothesis, suggested by Milgrom, has been successful in explaining systematic properties of spiral and elliptical galaxies and predicting in detail the observed rotation curves of spiral galaxies with only one additional parameter—a critical acceleration which is on the order of the cosmologically interesting value of 𝑐𝐻𝑜. MOND may be viewed as an algorithm for calculating the distribution of force in an astronomical object from the observed distribution of baryonic matter. …”
Get full text
Article