Holo-Club: Title: Boundary entropy and entanglement phase transitions in  holographic ICFTs

Title: Boundary entropy and entanglement phase transitions in
holographic ICFTs

Speaker: Evangelos Afxonidis (University of Oviedo)

Venue&Time: 11:30 / Gray Room 3

Abstract: In 1+1 dimensional conformal field theory with a boundary, the boundary contribution to the entanglement entropy is encoded in a single number g, effectively counting the boundary degrees of freedom. In contrast, for interface CFTs the corresponding quantity is a non-trivial function depending on the position of the interval relative to the interface, giving access to much more detailed information about the defect. In this talk, I will present several holographic examples illustrating the structure of this g-function and discuss the limit in which the entangling interval approaches the interface, relating it to the effective central charge. I will conclude with a discussion of entanglement phase transitions associated to bipartite entanglement in a variety of holographic interfaces.