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Author Silverstein, Eva ♦ Tong, David
Source CiteSeerX
Content type Text
File Format PDF
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Rolling Scalar Field ♦ Dimensional Gravity ♦ Strong Coupling Limit ♦ Super Yang Mill Theory ♦ Massive Scalar ♦ Slow Roll Inflation ♦ Novel Frw Cosmology ♦ Cosmological System ♦ Ad Cft Correspondence ♦ Strong Coupling Regime ♦ Gravity Side ♦ Microphysical Framework ♦ Speed Limit ♦ Light Degree ♦ Probe D3-brane ♦ Ad Poincare Patch ♦ Modulus Space ♦ Subplanckian Vev ♦ Flat Potential ♦ Dirac-born-infeld Lagrangian ♦ Derivative Operator ♦ Scalar Speed Limit ♦ Field Theory ♦ Scalar Field
Description Causality on the gravity side of the AdS/CFT correspondence restricts motion on the moduli space of the N = 4 super Yang Mills theory by imposing a speed limit on how fast the scalar field may roll. This effect can be traced to higher derivative operators arising from integrating out light degrees of freedom near the origin. In the strong coupling limit of the theory, the dynamics is well approximated by the Dirac-Born-Infeld Lagrangian for a probe D3-brane moving toward the horizon of the AdS Poincare patch, combined with an estimate of the (ultimately suppressed) rate of particle and string production in the system. We analyze the motion of a rolling scalar field explicitly in the strong coupling regime of the field theory, and extend the analysis to cosmological systems obtained by coupling this type of field theory to four dimensional gravity. This leads to a mechanism for slow roll inflation for a massive scalar at subPlanckian VEV without need for a flat potential (realizing a version of k-inflation in a microphysical framework). It also leads to a variety of novel FRW cosmologies, some of which
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study
Learning Resource Type Article
Publisher Institution DBI in the sky,” [arXiv:hep-th/0404084