Results 71 to 80 of about 131,283 (219)

Entropy in the Present and Early Universe: New Small Parameters and Dark Energy Problem

open access: yesEntropy, 2010
It is demonstrated that entropy and its density play a significant role in solving the problem of the vacuum energy density (cosmological constant) of the Universe and hence the dark energy problem.
Alexander Shalyt-Margolin
doaj   +1 more source

Cosmological Constant Problem

open access: yes, 2003
The cosmological constant problem is reviewed and a possible quantum gravity resolution is proposed. A space satellite E tv s experiment for zero-point vacuum energy is proposed to see whether Casimir vacuum energy falls in a gravitational field at the same rate as ordinary matter.
openaire   +2 more sources

Self-T-dual brane cosmology and the cosmological constant problem [PDF]

open access: yesJournal of Cosmology and Astroparticle Physics, 2006
Minor corrections, comments & references added.
CORRADINI, Olindo, Rinaldi, Massimiliano
openaire   +7 more sources

Analytical and Numerical Soliton Solutions of the Shynaray II‐A Equation Using the G′G,1G$$ \left(\frac{G^{\prime }}{G},\frac{1}{G}\right) $$‐Expansion Method and Regularization‐Based Neural Networks

open access: yesMathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT Nonlinear differential equations play a fundamental role in modeling complex physical phenomena across solid‐state physics, hydrodynamics, plasma physics, nonlinear optics, and biological systems. This study focuses on the Shynaray II‐A equation, a relatively less‐explored parametric nonlinear partial differential equation that describes ...
Aamir Farooq   +4 more
wiley   +1 more source

The Selfish Higgs

open access: yesJournal of High Energy Physics, 2019
We propose a mechanism to solve the Higgs naturalness problem through a cosmological selection process. The discharging of excited field configurations through membrane nucleation leads to discrete jumps of the cosmological constant and the Higgs mass ...
G.F. Giudice, A. Kehagias, A. Riotto
doaj   +1 more source

Calculation of the Cosmological Constant for the Planetary System in Schwarzschild’s Cosmological Model

open access: yesUniverse, 2022
In this work, the static cosmological model of the Schwarzschild solution for the solar system is proposed taking into account the cosmological constant in the equation of the general theory of relativity (GTR) proposed by A. Einstein.
Alvaro Humberto Salas Salas   +2 more
doaj   +1 more source

The Age and Origin of Block Deposits in the Victorian Alps, Australia

open access: yesPermafrost and Periglacial Processes, EarlyView.
ABSTRACT Large periglacial block deposits are found in the mountains of southeastern Australia. Despite their widespread distribution, their mode of formation and age are poorly understood. These landforms hold considerable potential to shed light on the nature of cooling during glacial periods. In this paper we present a new study of block deposits in
Timothy T. Barrows   +4 more
wiley   +1 more source

An étude on global vacuum energy sequester

open access: yesJournal of High Energy Physics, 2017
Recently two of the authors proposed a mechanism of vacuum energy sequester as a means of protecting the observable cosmological constant from quantum radiative corrections.
Guido D’Amico   +5 more
doaj   +1 more source

Constraining Dark Energy from the Local Group Dynamics

open access: yesThe Astrophysical Journal Letters, 2023
This Letter develops a method to constrain the cosmological constant Λ from binary galaxies, focusing on the Milky Way and Andromeda galaxies. We provide an analytical solution to the two-body problem with Λ and show that the ratio between the Keplerian ...
David Benisty   +2 more
doaj   +1 more source

Cosmological constant problem factor

open access: yes, 2020
The cosmological constant problem or vacuum catastrophe is localized in the convergence between general relativity and quantum field theory, it is considered as a fundamental problem in modern physics.
openaire   +1 more source

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