p-Wave Interactions in Low-Dimensional Fermionic gases

TL;DR

This paper investigates p-wave interactions in low-dimensional fermionic gases confined in optical lattices, revealing how confinement affects resonance behavior and suppresses losses, with implications for quantum simulation.

Contribution

It demonstrates control of p-wave Feshbach resonances in 1D and 2D gases and shows loss suppression in 3D lattices, advancing understanding of low-dimensional fermionic interactions.

Findings

Resonance shifts with increased confinement in 1D and 2D gases.

Observation of doublet structure of p-wave Feshbach resonance.

Complete suppression of losses in 3D optical lattice.

Abstract

We study a spin-polarized degenerate Fermi gas interacting via a p-wave Feshbach resonance in an optical lattice. The strong confinement available in this system allows us to realize one- and two-dimensional gases and therefore to restrict the asymptotic scattering states of atomic collisions. When aligning the atomic spins along (or perpendicular to) the axis of motion in a one-dimensional gas, scattering into channels with the projection of the angular momentum of |m|=1 (or m=0) can be inhibited. In two and three dimensions we observe the doublet structure of the p-wave Feshbach resonance. Both for the one-dimensional and the two-dimensional gas we find a shift of the position of the resonance with increasing confinement due to the change in collisional energy. In a three-dimensional optical lattice the losses on the Feshbach resonance are completely suppressed.