Time Evolution in String Field Theory and T-duality
Anton Ilderton, Paul Mansfield
Abstract
The time evolution operator (Schrödinger functional) of quantum field theory can be expressed in terms of first quantised particles moving on the orbifold S1/Z2. 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.
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