and Edward Witten on the compactification of superstrings in Calabi-Yau spaces. In the early 1990s, Horowitz and Strominger found black brane solutions in string theory. Horowitz also works on the AdS/CFT correspondence and (together with Sean Hartnoll and Chris Herzog) discovered holographic superconductors.

In 1982 Horowitz and M. Perry won first prize in the Gravity Research