2.9k citations
- University of WaterlooCA36 papers
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Showing 2004 · hep-thShow all
3 papers · 2 filters
hep-th2004★ 48 cited
Vector Perturbations in a Contracting Universe
Thorsten Battefeld, Robert Brandenberger
In this note we show that vector perturbations exhibit growing mode solutions in a contracting Universe, such as the contracting phase of the Pre Big Bang or the Cyclic/Ekpyrotic m…
hep-th2004★ 2.9k cited
Viscosity in Strongly Interacting Quantum Field Theories from Black Hole Physics
P. Kovtun, D. T. Son, A. O. Starinets
The ratio of shear viscosity to volume density of entropy can be used to characterize how close a given fluid is to being perfect. Using string theory methods, we show that this ra…
hep-th2004★ 14 cited
Sectional Curvature Bounds in Gravity: Regularisation of the Schwarzschild Singularity
Frederic P. Schuller, Mattias N. R. Wohlfarth
A general geometrical scheme is presented for the construction of novel classical gravity theories whose solutions obey two-sided bounds on the sectional curvatures along certain s…