A Pure Confinement Induced Trimer in One-Dimensional Atomic Waveguides

TL;DR

This paper investigates shallow three-atom bound states in one-dimensional harmonic waveguides near Feshbach resonances, revealing an excited trimer state that coexists with known dimers and trimers.

Contribution

It demonstrates the existence of a pure confinement-induced trimer in 1D waveguides, extending the understanding of few-body physics in low-dimensional quantum gases.

Findings

Existence of an excited trimer branch at large scattering lengths

Coexistence of this trimer with dimer and Lieb-Liniger trimers

Implications for few-body physics in 1D quantum systems

Abstract

Shallow trimers composed of three bosonic atoms in one-dimensional harmonic waveguides are studied in the vicinity of a Feshbach resonance. It is shown that for arbitrarily large values of the one-dimensional scattering length, an excited trimer branch exists in coexistence with the dimer and the trimer of the Lieb-Liniger model.