Results 21 to 30 of about 310,031 (299)
Physical Review D, 1995 An exploratory study of the cosmology of moduli in string theory. Moduli are argued to be natural inflaton fields and lead to a robust inflationary cosmology in which inflation takes place at the top of domain walls. The amplitude of microwave background fluctuations constrains the dynamics responsible for inflation to take place at a higher scale than
Banks, T. +4 more
openaire +3 more sources
Precision cosmology, Accuracy cosmology and Statistical cosmology [PDF]
Proceedings of the International Astronomical Union, 2014 AbstractThe avalanche of data over the past 10-20 years has propelled cosmology into the “precision era”. The next challenge cosmology has to meet is to enter the era of accuracy. Because of the intrinsic nature of studying the Cosmos and the sheer amount of data available now and coming soon, the only way to meet this challenge is by developing ...
openaire +1 more source
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2018 The discovery of the Higgs boson in 2012 and other results from the Large Hadron Collider have confirmed the standard model of particle physics as the correct theory of elementary particles and their interactions up to energies of several TeV. Remarkably, the theory may even remain valid all the way to the Planck scale of quantum gravity, and therefore
openaire +2 more sources
The problem of singularities and chaos in cosmology [PDF]
, 2010 We consider different aspects of the problem of cosmological singularity such as the BKL oscillatory approach to the singularity, the new features of the cosmological dynamics in the neighbourhood of the singularity in multidimensional and superstring ...
Kamenshchik, A. Yu.
core +1 more source
The Running Gravitational Couplings [PDF]
, 1998 We compute the running of the cosmological constant and Newton's constant taking into account the effect of quantum fields with any spin between 0 and 2. We find that Newton's constant does not vary appreciably but the cosmological constant can change by
Dou, Djamel, Percacci, Roberto
core +2 more sources
Cosmological observatories [PDF]
Classical and Quantum GravityAbstract We study the static patch of de Sitter space in the presence of a timelike boundary. We impose that the conformal class of the induced metric and the trace of the extrinsic curvature, K, are fixed at the boundary. We present the thermodynamic structure of de Sitter space subject to these boundary conditions, for static and ...
Dionysios Anninos +2 more
openaire +4 more sources
Constraining the $\Lambda$CDM and Galileon models with recent cosmological data [PDF]
, 2017 The Galileon theory belongs to the class of modified gravity models that can explain the late-time accelerated expansion of the Universe. In previous works, cosmological constraints on the Galileon model were derived, both in the uncoupled case and with ...
Astier, P. +6 more
core +4 more sources
Journal of High Energy Physics, 1999 JHEP LateX, 20 pages, no figures;v2 references added and a few minor changes; (v3) Corrected an inconsequential error in eq. 6.2, 6.3. We thank D. Kutasov for bringing this to our attention (v4) Corrected inconsequential errors in (4.4)-(4.7) and (5.11). We thank A.
Kehagias, Alexandros A., Kiritsis, Elias
openaire +2 more sources
Cosmological background solutions and cosmological backreactions
, 2009 The cosmological backreaction proposal, which attempts to account for observations without a primary dark energy source in the stress-energy tensor, has been developed and discussed by means of different approaches.
A. Gruzinov +50 more
core +1 more source
Classical and Quantum Gravity, 2019 49 pages, 18 ...
Sergio Bravo Medina +2 more
openaire +3 more sources