PIRSA:23010070

Video URL

https://pirsa.org/23010070

Bipartite entanglement and the arrow of time

Frembs, M. (2023). Bipartite entanglement and the arrow of time. Perimeter Institute for Theoretical Physics. https://pirsa.org/23010070

Frembs, Markus. Bipartite entanglement and the arrow of time. Perimeter Institute for Theoretical Physics, Jan. 10, 2023, https://pirsa.org/23010070 

          @misc{ scivideos_PIRSA:23010070,
            doi = {10.48660/23010070},
            url = {https://pirsa.org/23010070},
            author = {Frembs, Markus},
            keywords = {Quantum Foundations},
            language = {en},
            title = {Bipartite entanglement and the arrow of time},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2023},
            month = {jan},
            note = {PIRSA:23010070 see, \url{https://scivideos.org/pirsa/23010070}}
          }

Markus Frembs

Talk numberPIRSA:23010070
DOI10.48660/23010070
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

Quantum correlations in general and quantum entanglement in particular embody both our continued struggle towards a foundational understanding of quantum theory as well as the latter’s advantage over classical physics in various information processing tasks. Consequently, the problems of classifying (i) quantum states from more general (non-signalling) correlations, and (ii) entangled states within the set of all quantum states, are at the heart of the subject of quantum information theory.

In this talk I will present two recent results (from https://journals.aps.org/pra/abstract/10.1103/PhysRevA.106.062420 and https://arxiv.org/abs/2207.00024) that shed new light on these problems, by exploiting a surprising connection with time in quantum theory:

First, I will sketch a solution to problem (i) for the bipartite case, which identifies a key physical principle obeyed by quantum theory: quantum states preserve local time orientations—roughly, the unitary evolution in local subsystems.

Second, I will show that time orientations are intimately connected with quantum entanglement: a bipartite quantum state is separable if and only if it preserves arbitrary local time orientations. As a variant of Peres's well-known entanglement criterion, this provides a solution to problem (ii).

Zoom link:  https://pitp.zoom.us/j/97607837999?pwd=cXBYUmFVaDRpeFJSZ0JzVmhSajdwQT09