Results 111 to 120 of about 18,708 (249)
Avoided deconfinement in Randall-Sundrum models
Journal of High Energy Physics, 2021 We study first order phase transitions in Randall-Sundrum models in the early universe dual to confinement in large-N gauge theories. The transition rate to the confined phase is suppressed by a factor exp(− N 2), and may not complete for N » 1, instead ...
Prateek Agrawal, Michael Nee
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Brane cosmology from observational surveys and its comparison with standard FRW cosmology
, 2013 Several dark energy models on the brane are investigated. They are compared with corresponding theories in the frame of 4d Friedmann-Robertson-Walker cosmology.
Astashenok, A. V. +4 more
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Brane inflation: A field theory approach in background supergravity
, 2012 We propose a model of inflation in the framework of brane cosmology driven by background supergravity. Starting from bulk supergravity we construct the inflaton potential on the brane and employ it to investigate for the consequences to inflationary ...
Choudhury, Sayantan, Pal, Supratik
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Colliding Brane Cosmologies [PDF]
Progress of Theoretical Physics Supplement, 2006 I show how one may use exact time dependent solutions of either DBI theory, or supergravity theory to analyse in a mathematically precise fashion cosmologies in which our universe is one of many 3-branes in a higher spacetime which undergo collisions.
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Relic density of dark matter in brane world cosmology
, 2004 We investigate the thermal relic density of the cold dark matter in the context of the brane world cosmology. Since the expansion law in a high energy regime is modified from the one in the standard cosmology, if the dark matter decouples in such a high ...
Okada, Nobuchika, Seto, Osamu
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A worldsheet description of instant folded strings
Journal of High Energy Physics, 2023 Time-like linear dilaton backgrounds admit a classical solution that describes a closed folded string that is created at an instant. We refer to such strings as Instant Folded Strings (IFS).
Akikazu Hashimoto +2 more
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ASYMMETRIC EMBEDDING IN BRANE COSMOLOGY [PDF]
Modern Physics Letters A, 2008 We derive a system of cosmological equations for a braneworld with induced curvature which is a junction between several bulk spaces. The permutation symmetry of the bulk spaces is not imposed, and the values of the fundamental constants, and even the signatures of the extra dimension, may be different on different sides of the brane. We then consider
Shtanov, Yuri +2 more
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Shedding light on dark bubble cosmology
Journal of High Energy PhysicsDark bubble cosmology is an alternative paradigm to compactification, which can circumvent issues of moduli stabilization and scale separation. In this paper we investigate how electromagnetic fields can be incorporated in this framework.
Ivano Basile +3 more
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Aspects of string phenomenology in particle physics and cosmology
EPJ Web of Conferences, 2017 I discuss possible connections between several scales in particle physics and cosmology, such the the electroweak, inflation, dark energy and Planck scales. In particular, I discuss the physics of extra dimensions and low scale gravity that are motivated
Antoniadis I.
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Stability of Fluctating Baby-Skyrme Brane [PDF]
ITM Web of ConferencesThis work studies the stability of fluctuating Baby-Skyrme brane as a model for early-time cosmology recently introduced in [1]. The dynamical system consists of two dynamical quantities (ϕ, H) with two differential equations and one constraint.
Fadhilla Emir S. +3 more
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