Efimov physics in bosonic atom-trimer scattering

Bosonic atom-trimer scattering is studied in the unitary limit using momentum-space equations for four-particle transition operators. The impact of the Efimov effect on the atom-trimer scattering observables is explored, and a number of universal relations is established. Positions and widths of tetramer resonances are determined. The trimer relaxation rate constant is calculated.

Figure 1

$S$-, $P$-, and $D$-wave phase shifts for the atom scattering from the $n$th excited trimer.

Figure 2

$S$-wave inelasticity parameter for the atom scattering from the $n$th excited trimer.

Figure 3

Elastic and inelastic cross sections for atom scattering from the $n$th excited trimer.

Figure 4

Temperature dependence of the trimer relaxation rate constant.