Collisional loss of one-dimensional fermions near a $p$-wave Feshbach resonance

Abstract

We study collisional loss of a quasi-one-dimensional (1D) spin-polarized Fermi gas near a $p$-wave Feshbach resonance in ultracold ${}^6$Li atoms. We measure the location of the $p$-wave resonance in quasi-1D and observe a confinement-induced shift and broadening. We find that the three-body loss coefficient $L_3$ as a function of the quasi-1D confinement has little dependence on confinement strength. We also analyze the atom loss with a two-step cascade three-body loss model in which weakly bound dimers are formed prior to their loss arising from atom-dimer collisions. Our data are consistent with this model. We also find a possible suppression in the rate of dimer relaxation with strong quasi-1D confinement. We discuss the implications of these measurements for observing $p$-wave pairing in quasi-1D.

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• In Situ Thermometry of Fermionic Cold-Atom Quantum Wires
• Non-Hermitian topological Fermi superfluid near the $p$-wave unitary limit
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• Ultracold spin-balanced fermionic quantum liquids with renormalized $P$-wave interactions
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• Three-body recombination in a single-component Fermi gas with $p$-wave interaction
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• Efficient determination of eigenenergies and eigenstates of $N$ ($N=3$--$4$) identical 1D bosons and fermions under external harmonic confinement