Diffusion Monte Carlo study of a spin-imbalanced two-dimensional Fermi gas with attractive interactions
Strongly Correlated Electrons
2019-12-11 v1 Quantum Gases
Superconductivity
Abstract
We probe the superconducting gap in the zero temperature ground state of an attractively interacting spin-imbalanced two-dimensional Fermi gas with Diffusion Monte Carlo. A condensate fraction at nonzero pair momentum evidences a spatially non-uniform superconducting order parameter. Comparison with exact diagonalisation studies confirms that the nonzero condensate fraction across a range of nonzero fermion pair momenta is consistent with non-exclusive pairing between majority and minority fermions, an extension beyond FFLO theory.
Keywords
Cite
@article{arxiv.1910.13582,
title = {Diffusion Monte Carlo study of a spin-imbalanced two-dimensional Fermi gas with attractive interactions},
author = {D. C. W. Foo and G. J. Conduit},
journal= {arXiv preprint arXiv:1910.13582},
year = {2019}
}