Dirichlet Branes
and
boundary states
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Together with
M.B.
Green, I developed the boundary state description of
Dirichlet branes
in the light cone gauge
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D-Instantons
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Together with
M.B.
Green, I
constructed D-instantons 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 S-duality
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Flux branes
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Together
with M.Costa and A. Strominger, I found new
supergravity
solutions which generalize the Melvin solution of
Einstein-Maxwell
theory and give interpolations between supersymmetric and
nonsupersymmetric solutions.
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S-branes and time
dependent backgrounds in String theory
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Together with
A.
Strominger, I found new time dependend solutions
describing the
creation and decay of branes.
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Janus solution
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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
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Holographic duals
of
interfaces and junctions
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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
M-theory. These solutions preserve up to half the original
supersymmetry and are dual to interfaces and junctions of
CFT's.
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Black
Holes in Higher Spin gravity
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Together with P. Kraus, E.
Perlmutter and M. Ammon constructed black hole solutions in
three
dimensional higher spin theories which are described by
Chern-Simons
theories in the bulk.
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Entanglement entropy with Wilson
loop and surfaces
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Together with Simon Gentle we calculated the
holographic entanglement entropy of the bubbling
supergravity solutions describing Wilson loops with
representations of order N^2.
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