## Video URL

http://pirsa.org/23050081# Grad Student Seminar with Bruno Torres

### APA

de Souza Leao Torres, B. (2023). Grad Student Seminar with Bruno Torres. Perimeter Institute for Theoretical Physics. http://pirsa.org/23050081

### MLA

de Souza Leao Torres, Bruno. Grad Student Seminar with Bruno Torres. Perimeter Institute for Theoretical Physics, May. 01, 2023, http://pirsa.org/23050081

### BibTex

@misc{ scivideos_PIRSA:23050081, doi = {}, url = {http://pirsa.org/23050081}, author = {de Souza Leao Torres, Bruno}, keywords = {Other Physics}, language = {en}, title = {Grad Student Seminar with Bruno Torres}, publisher = {Perimeter Institute for Theoretical Physics}, year = {2023}, month = {may}, note = {PIRSA:23050081 see, \url{https://scivideos.org/index.php/PIRSA/23050081}} }

Bruno de Souza Leao Torres Perimeter Institute for Theoretical Physics

## Abstract

**Bruno Torres**, Perimeter Institute & University of Waterloo

*Optimal coupling for local entanglement extraction from a quantum field*

The entanglement structure of quantum fields is of central importance in various aspects of the connection between spacetime geometry and quantum field theory. However, it is challenging to quantify entanglement between complementary regions of a quantum field theory due to the formally infinite amount of entanglement present at short distances. We present an operationally-motivated way of analyzing entanglement in a QFT by considering the entanglement which can be transferred to a set of local probes coupled to the field. In particular, using a lattice approximation to the field theory, we show how to optimize the coupling of the local probes with the field in a given region to most accurately capture the original entanglement present between that region and its complement. This coupling prescription establishes a bound on the entanglement between complementary regions that can be extracted to probes with finitely many degrees of freedom.