Speaker: Gergő Roósz (Wigner RCP)
Title: Real space correlations and entanglement in the 2D Hubbard model
Date: Tuesday, 27 May, 2025. 10:00
Place: Building 1, Conference room
Abstract:
Using a diagrammatic extension of the Dynamical Meanfield Theory (DMFT), the parquet dynamical vertex approximation method, we calculate all two-site correlation functions of the Hubbard model, reconstruct the two-site reduced density matrix, and characterize the correlations and entanglement using the mutual information and the fermionic entanglement negativity. We also obtain the maximal correlation functions of the model between two sites. As a benchmark, we compare some of the quantities with quantum Monte-Carlo at half filling. We analyse the correlations as a function of distance, filling, interaction strength, and temperature.
