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Title: D-flation

Abstract

In a recent paper we showed how Starobinsky-like inflation could emerge from dilaton dynamics in brane cosmology scenarios based on string theory, in which our universe is represented as a three-brane and the effective potential acquires a constant term from a density of effectively point-like non-perturbative defects on the brane: ''D-particles''. Here we explore how quantum fluctuations of the ensemble of D-particles during the inflationary period may modify the effective inflationary potential due to the dilaton. We then discuss two specific ways in which an enhanced ratio of tensor to scalar perturbations may arise: via either a condensate of vector fields with a Born-Infeld action that may be due to such recoil fluctuations, or graviton production in the D-particle vacuum.

Authors:
;  [1]
  1. Theoretical Particle Physics and Cosmology Group, Department of Physics, King's College London, London WC2R 2LS (United Kingdom)
Publication Date:
OSTI Identifier:
22375758
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2014; Journal Issue: 11; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BORN-INFELD THEORY; COSMOLOGICAL INFLATION; DENSITY; FLUCTUATIONS; PERTURBATION THEORY; POTENTIALS; SCALARS; STRING MODELS; STRING THEORY; TENSORS; UNIVERSE; VECTOR FIELDS

Citation Formats

Ellis, John, Mavromatos, Nick E., and Nanopoulos, Dimitri V., E-mail: John.Ellis@cern.ch, E-mail: nikolaos.mavromatos@kcl.ac.uk, E-mail: dimitri@physics.tamu.edu. D-flation. United States: N. p., 2014. Web. doi:10.1088/1475-7516/2014/11/014.
Ellis, John, Mavromatos, Nick E., & Nanopoulos, Dimitri V., E-mail: John.Ellis@cern.ch, E-mail: nikolaos.mavromatos@kcl.ac.uk, E-mail: dimitri@physics.tamu.edu. D-flation. United States. https://doi.org/10.1088/1475-7516/2014/11/014
Ellis, John, Mavromatos, Nick E., and Nanopoulos, Dimitri V., E-mail: John.Ellis@cern.ch, E-mail: nikolaos.mavromatos@kcl.ac.uk, E-mail: dimitri@physics.tamu.edu. 2014. "D-flation". United States. https://doi.org/10.1088/1475-7516/2014/11/014.
@article{osti_22375758,
title = {D-flation},
author = {Ellis, John and Mavromatos, Nick E. and Nanopoulos, Dimitri V., E-mail: John.Ellis@cern.ch, E-mail: nikolaos.mavromatos@kcl.ac.uk, E-mail: dimitri@physics.tamu.edu},
abstractNote = {In a recent paper we showed how Starobinsky-like inflation could emerge from dilaton dynamics in brane cosmology scenarios based on string theory, in which our universe is represented as a three-brane and the effective potential acquires a constant term from a density of effectively point-like non-perturbative defects on the brane: ''D-particles''. Here we explore how quantum fluctuations of the ensemble of D-particles during the inflationary period may modify the effective inflationary potential due to the dilaton. We then discuss two specific ways in which an enhanced ratio of tensor to scalar perturbations may arise: via either a condensate of vector fields with a Born-Infeld action that may be due to such recoil fluctuations, or graviton production in the D-particle vacuum.},
doi = {10.1088/1475-7516/2014/11/014},
url = {https://www.osti.gov/biblio/22375758}, journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 11,
volume = 2014,
place = {United States},
year = {Sat Nov 01 00:00:00 EDT 2014},
month = {Sat Nov 01 00:00:00 EDT 2014}
}