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26 papers · 2 filters
Black Hole Microstates and Attractor Without Supersymmetry
Atish Dabholkar, Ashoke Sen, Sandip Trivedi
Due to the attractor mechanism, the entropy of an extremal black hole does not vary continuously as we vary the asymptotic values of various moduli fields. Using this fact we argue…
Noncritical-Topological Correspondence: Disc Amplitudes and Noncompact Branes
Anindya Mukherjee, Sunil Mukhi, Rahul Nigam
We examine the duality between type 0 noncritical strings and topological B-model strings, with special emphasis on the flux dependence. The former theory is known to exhibit holom…
Spectrum of CHL Dyons from Genus-Two Partition Function
Atish Dabholkar, Davide Gaiotto
We compute the genus-two chiral partition function of the left-moving heterotic string for a CHL orbifold. The required twisted determinants can be evaluated explici…
Spinning Strings as Small Black Rings
Atish Dabholkar, Norihiro Iizuka, Ashik Iqubal +2
Certain supersymmetric elementary string states with spin can be viewed as small black rings whose horizon has the topology of S^1 \times S^{d-3} in a d-dimensional string theory.…
Cosmologies with Null Singularities and their Gauge Theory Duals
Sumit R. Das, Jeremy Michelson, K. Narayan +1
We investigate backgrounds of Type IIB string theory with null singularities and their duals proposed in hep-th/0602107. The dual theory is a deformed N=4 Yang-Mills theory in 3+1…
Moduli and (un)attractor black hole thermodynamics
Dumitru Astefanesei, Kevin Goldstein, Swapna Mahapatra
We investigate four-dimensional spherically symmetric black hole solutions in gravity theories with massless, neutral scalars non-minimally coupled to gauge fields. In the non-extr…
Plasma balls/kinks as solitons of large confining gauge theories
Pallab Basu, Bobby Ezhuthachan, Spenta R. Wadia
We discuss finite regions of the deconfining phase of a confining gauge theory (plasma balls/kinks) as solitons of the large , long wavelength, effective Lagrangian of the therm…
Gauge theory description of the fate of the small Schwarzschild blackhole
Spenta R. Wadia
In this talk we discuss the fate of the small Schwarzschild blackhole of using the AdS/CFT correspondence at finite temperature. The third order phas…
Phases of unstable conifolds
K. Narayan
We explore the phase structure induced by closed string tachyon condensation of toric nonsupersymmetric conifold-like singularities described by an integral charge matrix $Q=(n_1 n…
Generalised HyperKaehler Manifolds in String Theory
Bobby Ezhuthachan, Debashis Ghoshal
We discuss the notion of generalised hyperKaehler structure in the context of string theory and discuss examples of this geometry.
Thermodynamic route to Field equations in Lanczos-Lovelock Gravity
Aseem Paranjape, Sudipta Sarkar, T. Padmanabhan
Spacetimes with horizons show a resemblance to thermodynamic systems and one can associate the notions of temperature and entropy with them. In the case of Einstein-Hilbert gravity…
Dual giant gravitons in AdS Y (Sasaki-Einstein)
Aniket Basu, Gautam Mandal
We consider BPS motion of dual giant gravitons on Ad where represents a five-dimensional Sasaki-Einstein manifold. We find that the phase space for the BPS dua…
Rotating Attractors
Dumitru Astefanesei, Kevin Goldstein, Rudra P. Jena +2
We prove that, in a general higher derivative theory of gravity coupled to abelian gauge fields and neutral scalar fields, the entropy and the near horizon background of a rotating…
Fractional two-branes, toric orbifolds and the quantum McKay correspondence
Bobby Ezhuthachan, Suresh Govindarajan, T. Jayaraman
We systematically study and obtain the large-volume analogues of fractional two-branes on resolutions of orbifolds C^3/Z_n. We study a generalisation of the McKay correspondence pr…
Supersymmetric states of N=4 Yang-Mills from giant gravitons
Indranil Biswas, Davide Gaiotto, Subhaneil Lahiri +1
Mikhailov has constructed an infinite family of 1/8 BPS D3-branes in AdS(5) x S**5. We regulate Mikhailov's solution space by focussing on finite dimensional submanifolds. Our subm…
FZZ Algebra
Anindya Mukherjee, Sunil Mukhi, Ari Pakman
The duality between the Sine-Liouville conformal field theory and the two dimensional black hole is revisited by considering the two possible Sine-Liouville dressings together. We…
String theory, quantum mechanics and noncommutative geometry: a new perspective on the gravitational dynamics of D0-branes
T. P. Singh
We do not know the symmetries underlying string theory. Furthermore, there must exist an inherently quantum, and spacetime independent, formulation of this theory. Independent of s…
Blackhole/String Transition for the Small Schwarzschild Blackhole of and Critical Unitary Matrix Models
Luis Alvarez-Gaume, Pallab Basu, Marcos Marino +1
In this paper we discuss the blackhole-string transition of the small Schwarzschild blackhole of using the AdS/CFT correspondence at finite temperature. The fini…
Bosonization of non-relativistic fermions on a circle: Tomonaga's problem revisited
Avinash Dhar, Gautam Mandal
We use the recently developed tools for an exact bosonization of a finite number of non-relativistic fermions to discuss the classic Tomonaga problem. In the case of noninterac…
Partition function of non-supersymmetric black holes in the supergravity limit
Shahrokh Parvizi, Alireza Tavanfar
In this note, we propose the free energy of general \emph{non-supersymmetric} black hole attractors arising in type IIA(B) superstrings on 3-fold Calabi-Yau, in the supergravity li…
Spectrum of Dyons and Black Holes in CHL orbifolds using Borcherds Lift
Atish Dabholkar, Suresh Nampuri
The degeneracies of supersymmetric quarter BPS dyons in four dimensions and of spinning black holes in five dimensions in a CHL compactification are computed exactly using Borcherd…
Time Dependent Cosmologies and Their Duals
Sumit R. Das, Jeremy Michelson, K. Narayan +1
We construct a family of solutions in IIB supergravity theory. These are time dependent or depend on a light-like coordinate and can be thought of as deformations of AdS_5 x S^5. S…
Non-Supersymmetric Attractors in Gravities
B. Chandrasekhar, S. Parvizi, A. Tavanfar +1
We investigate the attractor mechanism for spherically symmetric extremal black holes in a theory of general gravity in 4-dimensions, coupled to gauge fields and moduli field…
From Gravitons to Giants
Avinash Dhar, Gautam Mandal, Mikael Smedbäck
We discuss exact quantization of gravitational fluctuations in the half-BPS sector around AdSS background, using the dual super Yang-Mills theory. For this purpose…