Abstract
Entanglement entropy (EE) quantifies quantum entanglement in many-body systems and captures universal properties of quantum ground states. Obtaining this quantity requires an unbiased numerical approach. While methods such as exact diagonalization (ED) and the density matrix renormalization group (DMRG) can directly extract the ground-state wavefunction and calculate EE, they are limited to small system sizes or one-dimensional systems due to the exponential growth of the Hilbert space. In contrast, quantum Monte Carlo (QMC) maintains a polynomial computational complexity when calculating EE. A non-equilibrium method in QMC has been developed to extract EE, and we will explain how this approach precisely measures EE and its application.
Anyone interested is welcome to attend.