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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…
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.…
String Theory and Einstein's Dream
Ashoke Sen
This article contains a short review of the current status of string theory.
Dyon Spectrum in Generic N=4 Supersymmetric Z_N Orbifolds
Justin R. David, Dileep P. Jatkar, Ashoke Sen
We find the exact spectrum of a class of quarter BPS dyons in a generic N=4 supersymmetric Z_N orbifold of type IIA string theory on K3\times T^2 or T^6. We also find the asymptoti…
alpha'-Corrections to Extremal Dyonic Black Holes in Heterotic String Theory
Bindusar Sahoo, Ashoke Sen
We explicitly compute the entropy of an extremal dyonic black hole in heterotic string theory compactified on T^6 or K3\times T^2 by taking into account all the tree level four der…
Dyon Spectrum in N=4 Supersymmetric Type II String Theories
Justin R. David, Dileep P. Jatkar, Ashoke Sen
We compute the spectrum of quarter BPS dyons in freely acting Z_2 and Z_3 orbifolds of type II string theory compactified on a six dimensional torus. For large charges the result f…