Seminar – Dr. Pratik Rath

Speaker : Dr. Pratik Rath

University of California, Berkeley

Title : Entanglement Negativity and its Holographic Dual

Date : 6th May 2025

Time : 2:00 PM

Venue : LH-3, New Physical Science Building

Abstract:-

The entanglement negativity is a useful measure of quantum entanglement in bipartite mixed states. The holographic dual of this entanglement measure has been controversial with calculations based on CFT techniques conflicting with calculations in random tensor networks (RTNs) that predict replica symmetry breaking. In this talk, I will argue that replica symmetry is broken for general holographic states. The argument involves relating the entanglement negativity to the 1/2 Renyi entropy of a doubled state. In order to compute it holographically, I will also discuss a modified cosmic brane proposal for computing Renyi entropies for n<1. I will comment on the differences with previous CFT calculations as well as those arising from RTNs with non-maximally entangled links. Join Zoom Meeting: HERE

Meeting ID: 990 0717 1263
Passcode: 509805