542 citations · 6.9k across the 129 of their papers we have counts for
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On effective action of string theory flux compactifications
Alex Buchel
We discuss four dimensional effective actions of string theory flux compactifications. These effective actions describe four dimensional gravity coupled to overall Kahler modulus o…
Universality of the shear viscosity in supergravity
Alex Buchel, James T. Liu
Kovtun, Son and Starinets proposed a bound on the shear viscosity of any fluid in terms of its entropy density. We argue that this bound is always saturated for gauge theories at l…
Inflation in warped geometries
Alex Buchel, Radu Roiban
We argue that brane anti-brane inflation in string theory de-Sitter vacua of Kachru-Kallosh-Linde-Trivedi (KKLT) is captured by the dynamics of a D3-brane probe in the local KKLT m…
Comments on Supergravity Description of S-branes
Alex Buchel, Johannes Walcher
This is a note on the coupled supergravity-tachyon matter system, which has been earlier proposed as a candidate for the effective space-time description of S-branes. In particular…
Thermodynamics of the N=2* flow
Alex Buchel, James T. Liu
We discuss the thermodynamics of the N=2*, SU(N) gauge theory at large 't Hooft coupling. The tool we use is the non-extremal deformation of the supergravity solution of Pilch and…
Hagedorn vs. Hawking-Page transition in string theory
Alex Buchel, Leopoldo A. Pando Zayas
We study the supergravity dual to the confinement/deconfinement phase transition for the N=4 SU(N) SYM on R x S^3 with a chemical potential conjugate to a U(1)\subset SO(6)_R charg…