Found 5 result(s)
Regular Seminar Arkady Tseytlin (Imperial)
at: 16:00 room CG05  abstract:

Regular Seminar Arkady Tseytlin (Imperial College)
at: 13:15 room 423  abstract:

Regular Seminar Arkady Tseytlin (Imperial college)
at: 15:00 room 2B14  abstract:

Regular Seminar Arkady Tseytlin (Imperial College London)
at: 17:00 room C322  abstract: Motivated by a desire to find a useful 2d Lorentzinvariant reformulation of the AdS_5 x S 5 superstring worldsheet theory in terms of physical degrees of freedom we construct a Pohlmeyerreduced version of the corresponding sigma model. Starting with a coset space string sigma model in the conformal gauge and writing the classical equations in terms of currents one can fix the residual conformal diffeomorphism symmetry and kappasymmetry and introduce a new set of variables (related locally to currents but nonlocally to the original string coordinate fields) so that the Virasoro constraints are automatically satisfied. The resulting gaugefixed equations can be obtained from a Lagrangian of a nonabelian Toda type: a gauged WZWmodel with an integrable potential coupled also to a set of 2d fermionic fields. We show that in the special case of the AdS_2 x S2 superstring model the reduced theory is equivalent to the N=2 supersymmetric extension of the sineGordon model. 
String Theory & Geometry Seminar Arkady Tseytlin (Imperial College)
at: 13:30 room Maths Institute seminar room  abstract:
