Results 21 to 30 of about 468,012 (314)
A comparison of optimisation algorithms for high-dimensional particle and astrophysics applications
Journal of High Energy Physics, 2021 Optimisation problems are ubiquitous in particle and astrophysics, and involve locating the optimum of a complicated function of many parameters that may be computationally expensive to evaluate.
The DarkMachines High Dimensional Sampling Group +20 more
doaj +1 more source
Dark energy without dark energy [PDF]
AIP Conference Proceedings, 2006 4 pages, 1 figure, to appear in AIP proceedings of "Dark side of the Universe"
openaire +3 more sources
The Astronomical Journal, 2015 submitted to AJ Corresponding Authors H. T. Diehl (diehl@fnal.gov)
K. Patton +121 more
openaire +5 more sources
, 2023 I have been working on the fundamental laws of physics for a long time. During this time, I realized that gravity does not work like Newtonian and this misleads us into Dark Matter. The relationship between distance and gravitational force varies with distance.
openaire +1 more source
Physics Letters B, 2003 Velocity-dependent interactions in a fundamental-string dominated universe lead quite naturally, with reasonable assumptions on initial conditions, to an accelerating expanding universe without assuming the existence of a cosmological constant. This result also holds generically for a universe dominated by moving extremal black holes, owing to a ...
Ramzi R. Khuri, Ramzi R. Khuri
openaire +3 more sources
Dark energy in the dark ages [PDF]
Astroparticle Physics, 2006 Non-negligible dark energy density at high redshifts would indicate dark energy physics distinct from a cosmological constant or ``reasonable'' canonical scalar fields. Such dark energy can be constrained tightly through investigation of the growth of structure, with limits of \la2% of total energy density at z\gg1 for many models.
openaire +4 more sources
Dark energy and dark gravity: theory overview [PDF]
General Relativity and Gravitation, 2007 21 pages 10 figures Overview article for the dark energy issue of GRG revised to match version in print (minor typos corrected 4 refs. added)
Durrer, Ruth, Maartens, Roy
openaire +7 more sources
Physics Reports, 2017 We review the paradigm of holographic dark energy (HDE), which arises from a theoretical attempt of applying the holographic principle (HP) to the dark energy (DE) problem. Making use of the HP and the dimensional analysis, we derive the general formula of the energy density of HDE.
Shuang Wang, Yi Wang, Miao Li
openaire +4 more sources
Holographic Dark Information Energy: Predicted Dark Energy Measurement
Entropy, 2013 Several models have been proposed to explain the dark energy that is causing universe expansion to accelerate. Here the acceleration predicted by the Holographic Dark Information Energy (HDIE) model is compared to the acceleration that would be produced ...
Michael Paul Gough
doaj +1 more source
On the geometry of dark energy [PDF]
Classical and Quantum Gravity, 2005 Experimental evidence suggests that we live in a spatially flat, accelerating universe composed of roughly one-third of matter (baryonic + dark) and two-thirds of a negative-pressure dark component, generically called dark energy. The presence of such energy not only explains the observed accelerating expansion of the Universe but also provides the ...
J. M. F. Maia +3 more
openaire +4 more sources