Researchers explore a new connection between topology and quantum entanglement

https://phys.org/news/2022-08-explore-topology-quantum-entanglement.html

"mathematical relationship between genus of Fermi surface and quantum entanglement... Euler characteristic, which is closely related to the genus, provided the precise connection between the two... relationship between topology and entanglement held in a simple metal system, with electrons moving independently of one another, then extended their analysis to show that the connection was also present even when electrons interacted with greater complexity"