Samir Dayal Mathur is a theoretical physicist who specializes in string theory and black hole physics.

[1] Mathur's research is focused on string theory, black holes, the AdS/CFT correspondence, and cosmology.

[2] This quantum bound state replaces the event horizon and singularity, and the classical black hole metric is claimed to be an approximate effective description.

[3] In 2009 Mathur published a strong version of the black hole information paradox, strengthening Stephen Hawking's original version by demonstrating that small local corrections to Hawking's semiclassical analysis cannot restore unitarity.

[4] This result was obtained by applying Strong Subadditivity of Quantum Entropy to the evaporation of Hawking radiation.