Theodore Erler, Carlo Maccaferri
We show that given any two classical solutions in open string field theory
and a singular gauge transformation relating them, it is possible to write the
second solution as a gauge transformation of the first plus a singular,
projector-like state which describes the shift in the open string background
between the two solutions. This is the "phantom term." We give some
applications in the computation of gauge invariant observables.
View original:
http://arxiv.org/abs/1201.5122
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