DATA: 11-05-2017
**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. |