Showing 2009 · hep-thShow all

16 papers · 2 filters

hep-th2009★ 13 cited

Light-like mesons and deep inelastic scattering in finite-temperature AdS/CFT with flavor

E. Iancu, A. H. Mueller

We use the holographic dual of a finite-temperature, strongly-coupled, gauge theory with a small number of flavors of massive fundamental quarks to study meson excitations and deep…

hep-th2009★ 1 cited

Transport Properties of QCD at Large and the Gauge/String Duality

Jorge Noronha

Below the deconfinement phase transition large QCD is expected to be a very viscous hadronic fluid because both the shear and bulk viscosity to entropy density ratio, $η/s,ζ/…

hep-th2009★ 221 cited

Energy's and amplitudes' positivity

Alberto Nicolis, Riccardo Rattazzi, Enrico Trincherini

In QFT, the null energy condition (NEC) for a classical field configuration is usually associated with that configuration's stability against small perturbations, and with the sub-…

hep-th2009★ 10 cited

Particle production in DIS off a shockwave in AdS

Fabio Dominguez

Within the AdS/CFT correspondence, the shockwave metric has been widely used as a gravity dual for a fast moving nucleus. Here we propose a picture for particle production in deep…

hep-th2009★ 19 cited

Smooth Initial Conditions from Weak Gravity

Brian Greene, Kurt Hinterbichler, Simon Judes +1

CMB measurements reveal an unnaturally smooth early universe. We propose a mechanism to make this smoothness natural by weakening the strength of gravity at early times, and theref…

hep-th2009★ 23 cited

Stretched extra dimensions and bubbles of nothing in a toy model landscape

I-Sheng Yang

Using simple 6D junction conditions, we describe two surprising geometries. First in a case of transitions between dS4xS2 vacua, the S2 can be stretched significantly larger than t…

hep-th2009★ 51 cited

Connecting Polyakov Loops to the Thermodynamics of Gauge Theories Using the Gauge-String Duality

Jorge Noronha

We show that in four-dimensional gauge theories dual to five-dimensional Einstein gravity coupled to a single scalar field in the bulk the derivative of the single heavy quark free…

hep-th2009★ 42 cited

A Prehistory of n-Categorical Physics

John C. Baez, Aaron Lauda

This paper traces the growing role of categories and n-categories in physics, starting with groups and their role in relativity, and leading up to more sophisticated concepts which…

hep-th2009★ 13 cited

Dynamical Decompactification and Three Large Dimensions

Brian Greene, Dan Kabat, Stefanos Marnerides

We study string gas dynamics in the early universe and seek to realize the Brandenberger - Vafa mechanism - a goal that has eluded earlier works - that singles out three or fewer s…

hep-th2009★ 64 cited

A New Mechanism for Bubble Nucleation: Classical Transitions

Richard Easther, John T. Giblin, Lam Hui +1

Given a scalar field with metastable minima, bubbles nucleate quantum mechanically. When bubbles collide, energy stored in the bubble walls is converted into kinetic energy of the…

hep-th2009★ 16 cited

Boundary Terms and Junction Conditions for the DGP Pi-Lagrangian and Galileon

Ethan Dyer, Kurt Hinterbichler

In the decoupling limit of DGP, Pi describes the brane-bending degree of freedom. It obeys second order equations of motion, yet it is governed by a higher derivative Lagrangian. W…

hep-th2009★ 43 cited

Superluminality in DGP

Kurt Hinterbichler, Alberto Nicolis, Massimo Porrati

We reconsider the issue of superluminal propagation in the DGP model of infrared modified gravity. Superluminality was argued to exist in certain otherwise physical backgrounds by…

hep-th2009★ 128 cited

The "in-in" Formalism and Cosmological Perturbations

Peter Adshead, Richard Easther, Eugene A. Lim

We describe an efficient scheme for evaluating higher order contributions to primordial cosmological perturbations using the "in-in" formalism, which is the basis of modern calcula…

hep-th2009★ 58 cited

Stochastic trailing string and Langevin dynamics from AdS/CFT

G. C. Giecold, E. Iancu, A. H. Mueller

Using the gauge/string duality, we derive a set of Langevin equations describing the dynamics of a relativistic heavy quark moving with constant average speed through the strongly-…

hep-th2009★ 2 cited

Interactions of massless monopole clouds

Christopher M. Miller, Erick J. Weinberg

Some spontaneously broken gauge theories with unbroken non-Abelian gauge groups contain massless magnetic monopoles that are realized classically as clouds of non-Abelian field sur…

hep-th2009★ 49 cited

Eternal Inflation, Bubble Collisions, and the Disintegration of the Persistence of Memory

Ben Freivogel, Matthew Kleban, Alberto Nicolis +1

We compute the probability distribution for bubble collisions in an inflating false vacuum which decays by bubble nucleation. Our analysis generalizes previous work of Guth, Garrig…