QMC Meeting

Wednesday Jun 23, 2021, 10:30 AM → 11:30 AM America/New_York

Speaker: Yuan Yao He (CCQ)
Title:  Finite-temperature BCS-BEC crossover in 2D interacting Fermi gas

Abstract: 
The Fermi gas with a zero-range attraction is a model for strongly interacting fermions, which holds superfluidity ground state and the BCS-BEC crossover physics along with increasing interaction strength. Applying our recent speedup algorithm of finite-temperature auxiliary-field quantum Monte Carlo method, we have performed the numerically exact calculations of the finite-T properties of 2D Fermi gas with zero-range attraction. In Particular, we concentrate on the pairing properties of the system, from which the BKT transition temperatures are determined. The contact density and the Equation of State of this system are also obtained. Our results will surely serve as a very important benchmark for 2D Fermi gas experiments.