What is the dynamical interpretation of a wormhole in the worldsheet of a string?

Question

As explained in this paper and at the beginning of this TRF article, via AdS/CFT (and also ER/EPR) the entangled pair of a pair of colored quasi-particles corresponds to a wormhole on the worldsheed of the corresponding QCD string.

How is such a wormhole on the worldsheet interpretted from a string dynamic point of view? Conventionally the evolution of a worldsheet describes interactions between strings, such that a hole for example corresponds to the splitting and successive joining of strings, a handle describes the emission and reabsorptinon of a string, etc ...

But what does a wormhole on the worldsheed (or even on worldvolumes of higher dimensional objects) do from this point of view?

Answer 1

Part of answer to your question seems to appear in this paper http://arxiv.org/abs/1405.2065, page 6:The string worlsheet has worldvolume horizon at z=b, and thus the induced geometry is that of a non-traversable wormhole.