26.11.2008 (Wednesday)

Non-perturbative conformal invariance for time-dependent string backgrounds

Regular Seminar Jean Alexandre (King's College)

14:00 IC
room H503

A specific configuration of the bosonic string is discussed, in time-dependent backgrounds, which satisfies Weyl invariance to all orders in the alpha'-expansion. Conformal invariance, valid in any space time dimension, is based on the homogeneity (in time) of the Weyl-beta functions which, using field redefinitions, can be made to vanish.