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15 papers · 2 filters
New Supersymmetric String Compactifications
Shamit Kachru, Michael B. Schulz, Prasanta K. Tripathy +1
We describe a new class of supersymmetric string compactifications to 4d Minkowski space. These solutions involve type II strings propagating on (orientifolds of) non Calabi-Yau sp…
Duality Twists, Orbifolds, and Fluxes
Atish Dabholkar, Chris Hull
We investigate compactifications with duality twists and their relation to orbifolds and compactifications with fluxes. Inequivalent compactifications are classified by conjugacy c…
Open-String Actions and Noncommutativity Beyond the Large-B Limit
Sunil Mukhi, Nemani V. Suryanarayana
In the limit of large, constant B-field (the ``Seiberg-Witten limit''), the derivative expansion for open-superstring effective actions is naturally expressed in terms of the symme…
Aspects of Semiclassical Strings in AdS
Gautam Mandal, Nemani V. Suryanarayana, Spenta R. Wadia
We find an infinite number of conserved currents and charges in the semiclassical limit of string theory in AdS and remark on their relevance to conser…
Realizations of Conformal and Heisenberg Algebras in PP-wave-CFT Correspondence
Sumit R. Das, Cesar Gomez
We elaborate on the symmetry breaking pattern involved in the Penrose limit of spacetimes and the corresponding limit of the CFT dual. For d=2 we examine…
Supersymmetry Changing Bubbles in String Theory
S. Kachru, X. Liu, M. Schulz +1
We give examples of string compactifications to 4d Minkowski space with different amounts of supersymmetry that can be connected by spherical domain walls. The tension of these dom…
Strings from Quivers, Membranes from Moose
Sunil Mukhi, Mukund Rangamani, Erik Verlinde
We consider N=2 moose/quiver gauge theories corresponding to N_1 D3-branes at a C^2/Z_{N_2} singularity in the ``large moose'' limit where N_1 and N_2 are scaled to infinity togeth…
Dp Branes in PP-wave Background
Atish Dabholkar, Shahrokh Parvizi
Dirichlet p-branes in the background of pp waves are constructed using the massive Green-Schwarz worldsheet action for open strings. These branes are localized at the origin and on…
Penrose limit, Spontaneous Symmetry Breaking and Holography in PP-Wave Background
Sumit R. Das, Cesar Gomez, Soo-Jong Rey
We argue that the gauge theory dual to the Type IIB string theory in ten-dimensional pp-wave background can be thought to `live' on an {\it Euclidean} subspace spanning four of the…
Ghost Sector of Vacuum String Field Theory and the Projection Equation
Robertus Potting, Joris Raeymaekers
We study the ghost sector of vacuum string field theory where the BRST operator Q is given by the midpoint insertion proposed by Gaiotto, Rastelli, Sen and Zwiebach. We introduce a…
Thermality in de Sitter and Holography
Sumit R. Das
Assuming the existence of a correspondence we study the holograms of sources moving along geodesics in the bulk by calculating the one point functions they induce in the b…
Microscopic Formulation of Black Holes in String Theory
Justin R. David, Gautam Mandal, Spenta R. Wadia
In this Report we review the microscopic formulation of the five dimensional black hole of type IIB string theory in terms of the D1-D5 brane system. The emphasis here is more on t…
PP Wave Limit and Enhanced Supersymmetry in Gauge Theories
N. Itzhaki, Igor R. Klebanov, Sunil Mukhi
We observe that the pp wave limit of compactifications of type IIB string theory is universal, and maximally supersymmetric, as long as is smooth and preser…
Non-Commutative Instantons and the Information Metric
Shahrokh Parvizi
By using the so-called Information Metric on the moduli space of an anti-selfdual (ASD) Instanton in a Self-Dual (SD) Non-Commutative background, we investigate the geometry of mod…
Moduli Stabilization from Fluxes in a Simple IIB Orientifold
Shamit Kachru, Michael Schulz, Sandip Trivedi
We study novel type IIB compactifications on the T^6/Z_2 orientifold. This geometry arises in the T-dual description of Type I theory on T^6, and one normally introduces 16 space-f…