6 papers
Degenerate eigenvalues for Hamiltonians with no obvious symmetries
Steven S. Gubser, Robert K. Bradley
Certain Hamiltonians based on two coupled quantum mechanical spins exhibit degenerate eigenvalues despite having no obvious non-abelian symmetries. Operators acting to permute the…
TASI lectures: special holonomy in string theory and M-theory
Steven S. Gubser
A brief, example-oriented introduction is given to special holonomy and its uses in string theory and M-theory. We discuss A_k singularities and their resolution; the construction…
Supersymmetry and F-theory realization of the deformed conifold with three-form flux
Steven S. Gubser
It is shown that the deformed conifold solution with three-form flux, found by Klebanov and Strassler, is supersymmetric, and that it admits a simple F-theory description in terms…
Instability of charged black holes in anti-de Sitter space
Steven S. Gubser, Indrajit Mitra
We exhibit a tachyonic mode in a linearized analysis of perturbations of large anti-de Sitter Reissner-Nordstrom black holes in four dimensions. In the large black hole limit, and…
Dynamics of D-brane Black Holes
Steven S. Gubser
We explore the interplay between black holes in supergravity and quantum field theories on the world-volumes of D-branes. A brief summary of black hole entropy calculations for D-b…
Dilaton-driven confinement
Steven S. Gubser
We derive a solution of type IIB supergravity which is asymptotic to AdS_5 x S^5, has SO(6) symmetry, and exhibits some of the features expected of geometries dual to confining gau…