String theory, higher spin massless fields dynamics in various
dimensions, light cone and twistor formulations of relativistic
dynamics
Main results:
two loop betafunction in general nonlinear sigma model,
firstorder with respect to string tension effective action
for massless excitations of closed bosonic strings,
Born Infeld action as a unique action for stringy deformed ten
dimensional super YangMills theory, one loop equivalence of
effective action of open super string theory and ten dimensional super
YangMills theory, cubic interaction vertices for all massless
representations of the Poincare algebra in arbitrary spacetime dimension.
Kappainvariant and lightcone gauge actions of type IIB superstring
in AdS(5) x S(5). Formulatiuon of lightcone form of relativistic
dynamics in AdS spacetime.
Current interests:
Exact lightcone gauge action for massless higher spin fields in AdS(4).
Quantized fields in AdS spacetime. Problem of quatization of type IIB supestring
in AdS(5) x S(5), Dpbranes.
