Dirichlet Branes
and
boundary states

Together with
M.B.
Green, I developed the boundary state description of
Dirichlet branes
in the light cone gauge

DInstantons

Together with
M.B.
Green, I
constructed Dinstantons in type IIB superstring theory,
found
instanton induced terms in the effective action like R^4 and
determined
the exact form of these terms using Sduality

Flux branes

Together
with M.Costa and A. Strominger, I found new
supergravity
solutions which generalize the Melvin solution of
EinsteinMaxwell
theory and give interpolations between supersymmetric and
nonsupersymmetric solutions.

Sbranes and time
dependent backgrounds in String theory

Together with
A.
Strominger, I found new time dependend solutions
describing the
creation and decay of branes.

Janus solution

Together with D. Bak and S.
Hirano I found a dilatonic domain wall solution in AdS_5 x
S^5 which
corresponds to an interface solution in N=4 SYM where the
coupling
constant jumps across the interface

Holographic duals
of
interfaces and junctions

Together
with E. D'Hoker, J. Estes, D. Krym and M. Chiodaroli, I
found various
generalizations of the Janus solutions in type IIB string
theory and
Mtheory. These solutions preserve up to half the original
supersymmetry and are dual to interfaces and junctions of
CFT's.

Black
Holes in Higher Spin gravity

Together with P. Kraus, E.
Perlmutter and M. Ammon constructed black hole solutions in
three
dimensional higher spin theories which are described by
ChernSimons
theories in the bulk.

Entanglement entropy with Wilson
loop and surfaces

Together with Simon Gentle we calculated the
holographic entanglement entropy of the bubbling
supergravity solutions describing Wilson loops with
representations of order N^2.
