Zobrazeno 1 - 10
of 78
pro vyhledávání: '"Jaume Garriga"'
Publikováno v:
Dipòsit Digital de la UB
Universidad de Barcelona
Universidad de Barcelona
Primordial black holes (PBHs) may result from high peaks in a random field of cosmological perturbations. In single field inflationary models, such perturbations can be seeded as the inflaton overshoots a small barrier on its way down the potential.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d2bdcb2c9488134e7205a50bdc4ee883
http://hdl.handle.net/2445/172614
http://hdl.handle.net/2445/172614
Autor:
Jaume Garriga, Nikolaos Triantafyllou
Publikováno v:
Journal of Cosmology and Astroparticle Physics
The rate of merger events observed by LIGO/Virgo can be used in order to probe the fraction $f$ of dark mater in the form of Primordial Black Holes. Here, we consider the merger rate of PBH binaries, accounting for the effect of cosmological perturba
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b1ee976b7f2ccdcfbf5fdeaeb28d8d7
http://arxiv.org/abs/1907.01455
http://arxiv.org/abs/1907.01455
Autor:
Jaume garriga i arque
El libro es una guía para el crecimiento personal y el desarrollo de hábitos y habilidades comunicativas y en inteligencia emocional para vivir plenamente. Ello se complementa con las habilidades sociales, planificación de metas futuras, valores,
Autor:
Jaume Garriga, Yuko Urakawa
Publikováno v:
Journal of Cosmology and Astroparticle Physics
Recercat. Dipósit de la Recerca de Catalunya
instname
Dipòsit Digital de la UB
Universidad de Barcelona
Recercat. Dipósit de la Recerca de Catalunya
instname
Dipòsit Digital de la UB
Universidad de Barcelona
It is well known that, in single clock inflation, the curvature perturbation $\zeta$ is constant in time on superhorizon scales. In the standard bulk description this follows quite simply from the local conservation of the energy momentum tensor in t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::88087955f9bcabefa228a04df9871334
http://arxiv.org/abs/1606.04767
http://arxiv.org/abs/1606.04767
Publikováno v:
Dipòsit Digital de la UB
Universidad de Barcelona
Recercat. Dipósit de la Recerca de Catalunya
instname
Journal of Cosmology and Astroparticle Physics
Universidad de Barcelona
Recercat. Dipósit de la Recerca de Catalunya
instname
Journal of Cosmology and Astroparticle Physics
We consider the superpotential formalism to describe the evolution of D scalar fields during inflation, generalizing it to include the case with non-canonical kinetic terms. We provide a characterization of the attractor behaviour of the background e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f7a9091c7a5b58d2f429b6d6ae17c3b1
http://hdl.handle.net/2445/128246
http://hdl.handle.net/2445/128246
Publikováno v:
Dipòsit Digital de la UB
Universidad de Barcelona
Recercat. Dipósit de la Recerca de Catalunya
instname
Journal of Cosmology and Astroparticle Physics
Universidad de Barcelona
Recercat. Dipósit de la Recerca de Catalunya
instname
Journal of Cosmology and Astroparticle Physics
Vacuum bubbles may nucleate and expand during the inflationary epoch in the early universe. After inflation ends, the bubbles quickly dissipate their kinetic energy; they come to rest with respect to the Hubble flow and eventually form black holes. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::113dd11804b1a36c6ab4d674540e70c7
http://hdl.handle.net/2445/128217
http://hdl.handle.net/2445/128217
Publikováno v:
Journal of Cosmology and Astroparticle Physics. 2018:023-023
In de Sitter space, the current induced by an electric field in vacuum is known to feature certain peculiarities, such as infrared hyperconductivity for light bosons in weak electric fields. Moreover, negative conductivity has been claimed to occur f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::43ef61702ee820e8e8b3fd75ac6b511c
https://doi.org/10.1088/1475-7516/2018/10/023
https://doi.org/10.1088/1475-7516/2018/10/023
Publikováno v:
Journal of Cosmology and Astroparticle Physics
Many theories of the early universe predict the existence of a multiverse where bubbles continuously nucleate giving rise to observers in their interior. In this paper, we point out that topological defects of several dimensionalities will also be pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6a7cdddee1f92f8fc6738687a020e2f4
http://arxiv.org/abs/1501.05397
http://arxiv.org/abs/1501.05397
Autor:
Alexander Vilenkin, Jaume Garriga
Publikováno v:
Progress of Theoretical Physics Supplement. 163:245-257
We discuss probability distributions for the cosmological constant Lambda and the amplitude of primordial density fluctuations Q in models where they both are anthropic variables. With mild assumptions about the prior probabilities, the distribution
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5ac813f3a433d74abc64c066753f8d2a
https://doi.org/10.1143/ptps.163.245
https://doi.org/10.1143/ptps.163.245
Autor:
Jaume Garriga, Alex Pomarol
Publikováno v:
Physics Letters B. 560:91-97
We show that in the Randall-Sundrum model the Casimir energy of bulk gauge fields (or any of their supersymmetric relatives) has contributions that depend logarithmically on the radion. These contributions satisfactorily stabilize the radion, generat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ed182ac3afe763238e5d0c8c923ffb8a
https://doi.org/10.1016/s0370-2693(03)00301-0
https://doi.org/10.1016/s0370-2693(03)00301-0