Starting from 2022, the Math-Physics Group at SEU Yau Center will start regular lunch seminar. The general goal is to create a causual and free atmosphere for discussing new developments in theoretical physics, teaching ourselves about different subjects in physics and mathematics, sparking new ideas and collaborations...while enjoying the lunch.

While the atmosphere is expected to be free, lunch is not (because our fundings are not flexible enough to buy food and our salaries are not high enough to pay for everyone). We welcome external participants to join the fun, but with their own lunch :)

Here below is the information of this Thursday's lunch seminar.

Title: Balanced Partial Entanglement and Mixed State Correlations

Speaker: Qiang WEN (文强)

Affiliation: Southeast Universtiy

Time: 12:00-13:30, Thursday, May 5th, 2022 (UTC+8, Beijing Time)

Venue: Room 1502, Yifu Architecture Building, Sipailou Campus of Southeast University, Nanjing  

             (东南大学四牌楼校区逸夫建筑馆丘成桐中心1502室)

Abstract:

Firstly we will introduce the concept of the balanced partial entanglement entropy (BPE) and the method for its explicit computation. Considering a mixed state A \cup B in two dimensional theories, we will show that the BPE exactly gives the length of the entanglement wedge cross-section in both AdS/CFT and 3d flat holography. The BPE reduces to the reflected entropy in canonical purifications, but can be calculated in general purifications. It can be decomposed into the mutual information and an addtional universial tripartite entanglement (which is known as the Markov gap in canonical purification) when A and B are adjacent. We find that the universal tripartite entanglement is just the minimal value of the crossing PEE. The BPE is conjectured to be independent from the purifications, and we will give serval non-trival tests for this conjecture.