Now showing items 1-20 of 28

• #### The 0-brane Action in a General D = 4 Supergravity Background ﻿

(Institute of Physics Publishing, 1999)
We begin by presenting the superparticle action in the background of N=2, D=4 supergravity coupled to n vector multiplets interacting via an arbitrary special Kahler geometry. Our construction is based on implementing ...
• #### Attractors at Weak Gravity ﻿

(Elsevier, 1998)
We study the attractor mechanism in low energy effective D=4, N=2 Yang-Mills theory weakly coupled to gravity, obtained from the effective action of type IIB string theory compactified on a Calabi-Yau manifold. Using special ...
• #### Black Hole Bound States in AdS(3) x S**2 ﻿

(Institute of Physics, 2008)
We systematically construct the geometries dual to the 1+1 dimensional (0, 4) conformal field theories that arise in the low-energy description of wrapped M5-branes in S<sup>1</sup> × CY<sub>3</sub> compactifications of ...
• #### Black Hole Determinants and Quasinormal Modes ﻿

(Institute of Physics, 2010)
We derive an expression for functional determinants in thermal spacetimes as a product over the corresponding quasinormal modes. As simple applications we give efficient computations of scalar determinants in thermal AdS, ...
• #### Building a Better Racetrack ﻿

(Institute of Physics Publishing, 2004)
We find IIb compactifications on Calabi-Yau orientifolds in which all Kahler moduli are stabilized, along lines suggested by Kachru, Kallosh, Linde and Trivedi.
• #### Computational Complexity of the Landscape I ﻿

(Elsevier, 2007)
We study the computational complexity of the physical problem of finding vacua of string theory which agree with data, such as the cosmological constant, and show that such problems are typically NP hard. In particular, ...
• #### D-brane Deconstructions in IIB Orientifolds ﻿

(Institute of Physics, 2009)
With model building applications in mind, we collect and develop basic techniques to analyze the landscape of D7-branes in type IIB compact Calabi-Yau orientifolds, in three different pictures: F-theory, the D7 worldvolume ...
• #### Distributions of Flux Vacua ﻿

(American Institute of Physics, 2004)
We give results for the distribution and number of flux vacua of various types, supersymmetric and nonsupersymmetric, in IIb string theory compactified on Calabi-Yau manifolds. We compare this with related problems such ...
• #### Distributions of Nonsupersymmetric Flux Vacua ﻿

(Institute of Physics, 2005)
We continue the study of the distribution of nonsupersymmetric flux vacua in IIb string theory compactified on Calabi-Yau manifolds, as in hep-th/0404116. We show that the basic structure of this problem is that of ...
• #### Exact and Asymptotic Degeneracies of Small Black Holes ﻿

(Institute of Physics, 2005)
We examine the recently proposed relations between black hole entropy and the topological string in the context of type II/heterotic string dual models. We consider the degeneracies of perturbative heterotic BPS states. ...
• #### Exact Solutions for Supersymmetric Stationary Black Hole Composites ﻿

(Springer, 2011)
Four dimensional N = 2 supergravity has regular, stationary, asymptotically flat BPS solutions with intrinsic angular momentum, describing bound states of separate extremal black holes with mutually nonlocal charges. Though ...
• #### Fixing All Moduli in a Simple F-theory Compactification ﻿

(International Press, 2005)
We discuss a simple example of an F-theory compactification on a Calabi-Yau fourfold where background fluxes, nonperturbative effects from Euclidean D3 instantons and gauge dynamics on D7 branes allow us to fix all closed ...
• #### Hot Halos and Galactic Glasses (Carbonado) ﻿

(Springer Verlag, 2012)
We initiate a systematic study of the state space of non-extremal, stationary black hole bound states in four-dimensional $N$ = 2 supergravity. Specifically, we show that an exponential multitude of classically stable ...
• #### How Many Black Holes Fit on the Head of a Pin? ﻿

(Springer Verlag, 2007)
The Bekenstein–Hawking entropy of certain black holes can be computed microscopically in string theory by mapping the elusive problem of counting microstates of a strongly gravitating black hole to the tractable problem ...
• #### Landscape of Superconducting Membranes ﻿

(American Physical Society, 2009)
The AdS/CFT correspondence may connect the landscape of string vacua and the `atomic landscape' of condensed matter physics. We study the stability of a landscape of IR fixed points of N=2 large N gauge theories in 2+1 ...
• #### Non-Abelian Born-Infeld Versus String Theory ﻿

(Elsevier, 2000)
non-abelian Born-Infeld theory, defined by the symmetrized trace prescription, on tori with constant magnetic fields turned on. Subsequently, we compare this for several cases to the mass spectrum of intersecting D-branes. ...
• #### Orientiholes ﻿

(Springer, 2010)
By T-dualizing space-filling D-branes in 4d IIB orientifold compactifications along the three non-internal spatial directions, we obtain black hole bound states living in a universe with a gauged spatial reflection symmetry. ...
• #### Physics of String Flux Compactifications ﻿

(Annual Reviews, Inc., 2007)
We provide a qualitative review of flux compactifications of string theory, focusing on broad physical implications and statistical methods of analysis.
• #### Precision Counting of Small Black Holes ﻿

(Institute of Physics, 2005)
It has recently been proposed that a class of supersymmetric higher-derivative interactions in Script N = 2 supergravity may encapsulate an infinite number of finite size corrections to the microscopic entropy of certain ...
• #### Quantum Oscillations and Black Hole Ringing ﻿

(American Physical Society, 2009)
We show that strongly coupled field theories with holographic gravity duals at finite charge density and low temperatures can undergo de Haas–van Alphen quantum oscillations as a function of an external magnetic field. ...