Results 31 to 40 of about 305,041 (219)

Mathematical issues in eternal inflation [PDF]

Classical and Quantum Gravity, 2015
In this paper, we consider the problem of existence and uniqueness of solutions to the Einstein field equations for a spatially flat FLRW universe in the context of stochastic eternal inflation where the stochastic mechanism is modelled by adding a stochastic forcing term representing Gaussian white noise to the Klein-Gordon equation.
Kohli, Ikjyot Singh, Haslam, Michael C.
openaire   +2 more sources

Time-dependent quantum correlations in two-dimensional expanding spacetime

European Physical Journal C: Particles and Fields, 2021
In expanding universes, the entanglement entropy must be time-dependent because the background geometry changes with time. For understanding time evolution of quantum correlations, we take into account two distinct holographic models, the dS boundary ...
Chanyong Park
doaj   +1 more source

Prescription for probabilities in eternal inflation [PDF]

Physical Review D, 2001
15 pages, 5 ...
Garriga Torres, Jaume, Vilenkin, A. (Alexander)   +1 more
openaire   +3 more sources

Eternal inflation in swampy landscapes [PDF]

Journal of Cosmology and Astroparticle Physics, 2020
The much-discussed swampland conjectures suggest significant constraints on the properties of string theory landscape and on the nature of the multiverse that this landscape can support. The conjectures are especially constraining for models of inflation; in particular, they exclude the existence of de Sitter (dS) vacua.
Blanco-Pillado, Jose J., Deng, Heling, Vilenkin, Alexander   +2 more
openaire   +3 more sources

Non-minimal M-flation

Journal of High Energy Physics, 2020
We show how in a matrix inflationary model in which there is a non-minimal coupling between the matrix inflatons and gravity — hence dubbed Non-M-flation — some of the disadvantages of the minimal model can be avoided.
Amjad Ashoorioon, Kazem Rezazadeh
doaj   +1 more source

Eternal inflation: The inside story [PDF]

Physical Review D, 2006
Motivated by the lessons of black hole complementarity, we develop a causal patch description of eternal inflation. We argue that an observer cannot ascribe a semiclassical geometry to regions outside his horizon, because the large-scale metric is governed by the fluctuations of quantum fields.
Bousso, Raphael, Freivogel, Ben, Yang, I-Sheng   +2 more
openaire   +2 more sources

De Sitter diagrammar and the resummation of time

Journal of High Energy Physics, 2020
Light scalars in inflationary spacetimes suffer from logarithmic infrared divergences at every order in perturbation theory. This corresponds to the scalar field values in different Hubble patches undergoing a random walk of quantum fluctuations, leading
Matthew Baumgart, Raman Sundrum
doaj   +1 more source

The phase transition to eternal inflation [PDF]

Journal of High Energy Physics, 2008
48 pages, 8 figures.
Creminelli, Paolo, Dubovsky, Sergei, Nicolis, Alberto, Senatore, Leonardo, Zaldarriaga, Matias   +4 more
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De Sitter quantum breaking, swampland conjectures and thermal strings

Journal of High Energy Physics, 2021
We argue that under certain assumptions the quantum break time approach and the trans-Planckian censorship conjecture both lead to de Sitter swampland constraints of the same functional form.
Ralph Blumenhagen, Christian Kneißl, Andriana Makridou   +2 more
doaj   +1 more source

Localization on the landscape and eternal inflation [PDF]

Classical and Quantum Gravity, 2014
21 ...
Mersini-Houghton, Laura, Perry, Malcolm J.   +1 more
openaire   +2 more sources