Speaker
Aatu Rajala
(University of Helsinki)
Description
In this talk, I will present our argument that, in the limit of large subregions, the derivative of entanglement entropy (EE) with respect to the size of the entangling region approaches the thermal entropy density for general QFTs. We provide validation for these claims from our lattice computations in the three-dimensional O(4) model at finite chemical potential by showing that in the corresponding limit, the EE derivative satisfies the same Maxwell relation as the thermal entropy density. These results pave the way for extracting thermodynamics from EE data in general QFTs.