SEZIONE DI FIRENZE
Seminario di Federico Galli The notion of entwinement originated in the context of holography and was proposed to characterize the entanglement between internal gauged degrees of freedom in a quantum field theory. I will discuss how entwinement can formally be defined through the replica method in terms of a non-local gauge-invariant object, and apply this method to the computation of entwinement in symmetric orbifold conformal field theories in 1+1 dimensions. Such a theory appears in the weak coupling limit of the D1-D5 string theory which is dual to AdS_3 at strong coupling. In this context, I will show how this novel quantity measures the lengths, in units of the AdS scale, of non-minimal geodesics present in excited states of the system, which are gravitationally described as conical defects and the zero mass BTZ black hole.

DATA: 11-05-2017