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9 papers · 2 filters
A Stringy Cloak for a Classical Singularity
Atish Dabholkar, Renata Kallosh, Alexander Maloney
We consider a class of 4D supersymmetric black hole solutions, arising from string theory compactifications, which classically have vanishing horizon area and singular space-time g…
Exact Counting of Black Hole Microstates
Atish Dabholkar
The exact entropy of two-charge supersymmetric black holes in N=4 string theories is computed to all orders using Wald's formula and the supersymmetric attractor equations with an…
Gaugino Condensation and Nonperturbative Superpotentials in Flux Compactifications
Lars Goerlich, Shamit Kachru, Prasanta K. Tripathy +1
There are two known sources of nonperturbative superpotentials for Kähler moduli in type IIB orientifolds, or F-theory compactifications on Calabi-Yau fourfolds, with flux: Euclide…
Liouville D-branes in Two-Dimensional Strings and Open String Field Theory
Debashis Ghoshal, Sunil Mukhi, Sameer Murthy
We study open strings in the noncritical bosonic string theory compactified on a circle at self-dual radius. These strings live on D-branes that are extended along the Liouvi…
D0 Matrix Mechanics: New Fuzzy Solutions at Large N
Subodh P Patil
We wish to consider in this report the large N limit of a particular matrix model introduced by Myers describing D-brane physics in the presence of an RR flux background. At finite…
An Inflationary Model in String Theory
Norihiro Iizuka, Sandip P. Trivedi
We construct a model of inflation in string theory after carefully taking into account moduli stabilization. The setting is a warped compactification of Type IIB string theory in t…
On the Taxonomy of Flux Vacua
A. Giryavets, S. Kachru, P. K. Tripathy
We investigate several predictions about the properties of IIB flux vacua on Calabi-Yau orientifolds, by constructing and characterizing a very large set of vacua in a specific exa…
Off-Shell Interactions for Closed-String Tachyons
Atish Dabholkar, Ashik Iqubal, Joris Raeymaekers
Off-shell interactions for localized closed-string tachyons in C/Z_N superstring backgrounds are analyzed and a conjecture for the effective height of the tachyon potential is elab…
Flux Compactifications on Calabi-Yau Threefolds
Alexander Giryavets, Shamit Kachru, Prasanta K. Tripathy +1
The presence of RR and NS three-form fluxes in type IIB string compactification on a Calabi-Yau orientifold gives rise to a nontrivial superpotential W for the dilaton and complex…