Time Evolution in String Field Theory and T-duality
arXiv:hep-th/0410267 · doi:10.1016/j.physletb.2004.12.066
Abstract
The time evolution operator (Schrödinger functional) of quantum field theory can be expressed in terms of first quantised particles moving on the orbifold . We give a graphical derivation of this that generalises to second quantised string theory. T-duality then relates evolution through time t with evolution through 1/t and an interchange of string fields and backgrounds.
11 Pages, 10 .eps figures; revised version includes discussion of BRST symmetry