Results 21 to 30 of about 42,432 (292)
Swampland constraints on no-boundary quantum cosmology
Journal of High Energy Physics, 2020 The Hartle-Hawking no-boundary proposal describes the quantum creation of the universe. To have a non-negligible probability to obtain a classical expanding universe, eternal inflation is required, which is severely constrained by Swampland conjectures ...
Hiroki Matsui, Takahiro Terada
doaj +1 more source
Super-gauge field in de Sitter universe [PDF]
The European Physical Journal C, 2016 The Gupta-Bleuler triplet for vector-spinor gauge field is presented in de Sitter ambient space formalism. The invariant space of field equation solutions is obtained with respect to an indecomposable representation of the de Sitter group. By using the general solution of the massless spin-$\frac{3}{2}$ field equation, the vector-spinor quantum field ...
Parsamehr, S., Enayati, M., Takook, M.V.
openaire +2 more sources
Emergent de Sitter cosmology near black hole horizon
Journal of High Energy Physics, 2022 We propose an effective model for an exponentially expanding universe in the brane-world scenario. The setup consists of a 5D black hole and a brane close to the black hole horizon.
Ida M. Rasulian
doaj +1 more source
How Not to Construct an Asymptotically de Sitter Universe [PDF]
, 2002 Observational evidence suggests that our universe is currently evolving towards an asymptotically de Sitter future. Unfortunately and in spite of much recent attention, various quantum, holographic and cosmological aspects of de Sitter space remain quite
't Hooft G +48 more
core +2 more sources
Planckian Birth of a Quantum de Sitter Universe [PDF]
Physical Review Letters, 2008 Article unchanged.
Ambjørn, Jan +3 more
openaire +6 more sources
CPT Symmetry in Two-Fold de Sitter Universe [PDF]
Symmetry, 2021 The problem of baryon asymmetry unifies cosmology and particle physics at the hearth of theoretical physics. In this work, we consider the point of view of archaic cosmology based on the de Sitter hypersphere as topology of quantum vacuum. We show CPT symmetry derives from the nucleation of particles that divides the hypersphere in two mirror universes
Davide Fiscaletti +2 more
openaire +1 more source
Inhomogeneous Viscous Fluids in a Friedmann-Robertson-Walker (FRW) Universe
Galaxies, 2013 We give a brief review of some aspects of inhomogeneous viscous fluids in a flat Friedmann-Robertson-Walker Universe. In general, it is pointed out that several fluid models may bring the future Universe evolution to become singular, with the appearance ...
Ratbay Myrzakulov +2 more
doaj +1 more source
Scalar Tachyons in the de Sitter Universe [PDF]
Letters in Mathematical Physics, 2010 9 ...
Bros J., Epstein H., MOSCHELLA, UGO
openaire +4 more sources
Linear Weyl gravity in de Sitter universe [PDF]
Journal of High Energy Physics, 2010 In this paper we obtain the linear Weyl gravity in de Sitter background. Its linear form in five-dimensional ambient space notation has also been obtained. From the group theoretical point of view, we show that this conformal invariant fourth order theory in its linear form does not transform as an unitary irreducible representation of the de Sitter ...
Takook, M. V., Tanhayi, M. R.
openaire +3 more sources
Bifurcations in Ratra–Peebles quintessence models and their extensions
European Physical Journal C: Particles and Fields, 2019 We have used the dynamical system approach in order to investigate the dynamics of cosmological models of the flat Universe with a non-minimally coupled canonical and phantom scalar field and the Ratra–Peebles potential.
Franciszek Humieja, Marek Szydłowski
doaj +1 more source