In what year did Strominger and Vafa show their black hle theory ?
His contributions to physics include : a paper with Cumrun Vafa that explains the microscopic origin of the black hole entropy , originally calculated thermodynamically by Stephen Hawking and Jacob Bekenstein , from string theory a paper with Philip Candelas , Gary Horowitz , and Edward Witten in the 1980s about the relevance of Calabi - Yau manifolds for obtaining the Standard Model from string theory other articles discussing the dS / CFT correspondence ( a variation of AdS / CFT correspondence ) ; S - branes ( a variation of D - branes ) OM - theory ( with Shiraz Minwalla and Nathan Seiberg ) noncommutative solitons ( with Shiraz Minwalla and Rajesh Gopakumar ) massless black holes in the form of wrapped D3 - branes that regulate the physics of a conifold and allow topology change interpretation of mirror symmetry as a special case of T-duality ( with Eric Zaslow and Shing - Tung Yau ) purely cubic action for string field theory superstrings with torsion