Abstract
Using the coherent state formalism we calculate matrix elements of the one-loop non-planar dilatation operator of = 4 SYM between operators dual to folded Frolov-Tseytlin strings and observe a curious scaling behavior. We comment on the qualitative similarity of our matrix elements to the interaction vertex of a string field theory. In addition, we present a solvable toy model for string splitting and joining. The scaling behaviour of the matrix elements suggests that the contribution to the genus one energy shift coming from semi-classical string splitting and joining is small.
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