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Wall-Crossing from Boltzmann Black Hole Halos
Jan Manschot, Boris Pioline, Ashoke Sen
A key question in the study of N=2 supersymmetric string or field theories is to understand the decay of BPS bound states across walls of marginal stability in the space of paramet…
Supersymmetric Index from Black Hole Entropy
Atish Dabholkar, Joao Gomes, Sameer Murthy +1
For BPS black holes with at least four unbroken supercharges, we describe how the macroscopic entropy can be used to compute an appropriate index, which can be then compared with t…
How Do Black Holes Predict the Sign of the Fourier Coefficients of Siegel Modular Forms?
Ashoke Sen
Single centered supersymmetric black holes in four dimensions have spherically symmetric horizon and hence carry zero angular momentum. This leads to a specific sign of the helicit…
Black Hole Microstate Counting and its Macroscopic Counterpart
Ipsita Mandal, Ashoke Sen
We survey recent results on the exact dyon spectrum in a class of N=4 supersymmetric string theories, and discuss how the results can be understood from the macroscopic viewpoint u…
Logarithmic Corrections to Extremal Black Hole Entropy from Quantum Entropy Function
Shamik Banerjee, Rajesh K. Gupta, Ashoke Sen
We evaluate the one loop determinant of matter multiplet fields of N=4 supergravity in the near horizon geometry of quarter BPS black holes, and use it to calculate logarithmic cor…
Discrete Information from CHL Black Holes
Ashoke Sen
AdS_2/CFT_1 correspondence predicts that the logarithm of a Z_N twisted index over states carrying a fixed set of charges grows as 1/N times the entropy of the black hole carrying…