Quantum Monte Carlo study of strongly interacting Fermi gases

17th International Conference on Recent Progress in Many-Body Theories

Gandolfi, S.^1

Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, United States^1

关键词: BCS-BEC crossover;    Contact parameters;    Effective range;    Quantum monte carlo;    Quantum monte carlo studies;    Static structure factors;    Two-component;    Zero temperatures;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/529/1/012011/pdf
DOI  :  10.1088/1742-6596/529/1/012011

来源: IOP

【 摘 要 】

In recent years Quantum Monte Carlo techniques provided to be a valuable tool to study strongly interacting Fermi gases at zero temperature. We have used QMC methods to investigate several properties of the two-components Fermi gas at unitarity and in the BCS-BEC crossover, both with equal and unequal masses corresponding to the Li-K Fermi mixture. In this paper we present several recent QMC results, including the energy at zero and finite effective range, the contact parameter and the static structure factor, which, at low momentum, depends strongly on the phonons in the unitary Fermi gas.