Work

Quantum Monte Carlo study of low-dimensional Fermi fluids of dipolar atoms

Year: 2025

Type: article

Abstract: Fermionic cold atoms in optical traps provide viable quantum simulators of correlation effects in electronic systems. For dressed Rydberg atoms in two-dimensional traps with out-of-plane dipole moments, a realistic model of the pairwise interaction is of repulsive dipolar 1 / r 3 form at long range, softened to a constant at short range. This study provides parametrizations of fixed-node diffusion Monte Carlo energy data for ferromagnetic (one-component) and paramagnetic (two-component) two-dimensional homogeneous Fermi fluids of interacting dipolar atoms. We find itinerant ferromagnetism to be unstable within our parameter spaces for dipolar interactions both with and without softening. Our parametrization of the energy as a function of density will enable density functional theory to support experimental studies of inhomogeneous fermionic cold-atom systems.

Source: Physical Review A

DOI: 10.1103/gx6b-t48r

Authors: Clio Johnson, Neil D. Drummond, James P. Hague, Calum MacCormick

Institutions: Lancaster University, The Open University

Language: English

Topic: Cold Atom Physics and Bose-Einstein Condensates

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,675

Funder: Lancaster University