Results 31 to 40 of about 1,836,799 (336)

Fingerprinting dark energy [PDF]

Physical Review D, 2009
11 pages, 5 figures, minor changes to match published ...
Sapone, Domenico, Kunz, Martin
openaire   +3 more sources

Condensate cosmology -- dark energy from dark matter [PDF]

, 2002
Imagine a scenario in which the dark energy forms via the condensation of dark matter at some low redshift. The Compton wavelength therefore changes from small to very large at the transition, unlike quintessence or metamorphosis.
A. Arbey, A. de la Macorra, A.G. Riess, A.G. Riess, A.T. Lee, A.Yu. Kamenshchik, B.A. Bassett, B.A. Bassett, B.P. Schmidt, C. Armendariz-Picon, C. Skordis, C.B. Netterfield, C.J. Miller, D.N. Spergel, H. Goldberg, J.A. Frieman, J.K. Erickson, J.S. Alcaniz, L. Griffiths, L. Parker, L. Parker, L. Parker, L.I. Gurvits, M. Bernardi, M. Doran, M. Doran, M. Magliocchetti, M. Tegmark, M.C. Bento, M.C. Bento, N. Benitez, N. Bilic, N. Deruelle, N.W. Halverson, P. de Bernardis, P.M. Garnavich, P.S. Corasaniti, P.S. Corasaniti, R. Bean, R. Durrer, R.D. Ball, R.H. Brandenberger, R.R. Caldwell, S. Perlmutter, S. Perlmutter, T. Moroi, T. Moroi, T. Padmanabhan, T. Theuns, U. Seljak, V. Sahni, W. Hu, W. Hu, W. Hu, W.L.W. Sargent   +54 more
core   +2 more sources

Holographic dark energy [PDF]

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   +3 more sources

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, Csaba Balázs, Melissa van Beekveld, Sascha Caron, Barry M. Dillon, Ben Farmer, Andrew Fowlie, Eduardo C. Garrido-Merchán, Will Handley, Luc Hendriks, Guðlaugur Jóhannesson, Adam Leinweber, Judita Mamužić, Gregory D. Martinez, Sydney Otten, Roberto Ruiz de Austri, Pat Scott, Zachary Searle, Bob Stienen, Joaquin Vanschoren, Martin White   +20 more
doaj   +1 more source

Dark energy: Staring into darkness [PDF]

Nature, 2016
The path to understanding dark energy begins with a single question: has it always been the same throughout the history of the Universe?
openaire   +2 more sources

Barrow entropic dark energy: A member of generalized holographic dark energy family

Physics Letters B, 2022
The holographic cut-off, in the formalism of generalized holographic dark energy (HDE), is generalized to depend on LIR=LIR(Lp,L˙p,L¨p,⋯,Lf,L˙f,⋯,a), where Lp and Lf are the particle horizon and future horizon respectively, and a is the scale factor of ...
Shin'ichi Nojiri, Sergei D. Odintsov, Tanmoy Paul   +2 more
doaj   +1 more source

Scaling dark energy

Physical Review D, 2004
We investigate the possibility of a dark energy component that is scaling with epochs. A phenomenological model is introduced whose energy density depends on the redshift in such a way that a smooth transition among the three dominant phases of the universe evolution (radiation era, matter domination, asymptotic de Sitter state) is achieved. We use the
CAPOZZIELLO, SALVATORE, MELCHIORRI A., SCHIRONE A.   +2 more
openaire   +4 more sources

Dark Energy from Cosmological Energy Conservation

Advances in Astronomy, 2023
The value of the gravitational wave energy density is unknown. Current progress in gravitational wave detection suggests that the energy density of the stochastic gravitational wave background (SGWB) will be estimated in the next decades. A derivation of
Manuel Uruena Palomo
doaj   +1 more source

Accelerated Universe from Modified Chaplygin Gas and Tachyonic Fluid

Universe, 2022
A cosmological model with an exotic fluid is investigated. We show that the equation of state of this “modified Chaplygin” gas can describe the current accelerated expansion of the universe.
Hachemi Benaoum
doaj   +1 more source

Dark Matter and Dark Energy

, 2004
I briefly review our current understanding of dark matter and dark energy. The first part of this paper focusses on issues pertaining to dark matter including observational evidence for its existence, current constraints and the `abundance of ...
197, 28. Bolatto, A,D, A. Albrecht, A. Lue, B. Boisseau, C. Armendariz-Picon, C. Avelino, J.S. Alcaniz, L. Amendola, L. Amendola, Sakharov, T.D. Saini, T.R. Mongan, V. Sahni   +13 more
core   +1 more source