Three resonant ultracold bosons: off-resonance effects.
We solve a finite range two-channel model for three resonant identical bosons. The model provides a minimal description of the various magnetic Feshbach resonances in single species ultracold bosonic systems, including off-resonant scattering. We obtain important insights into the interpretation of seminal experiments: the three-body recombination rate measured in sodium and the Efimov resonances observed in cesium. This approach quantifies nonuniversal effects appearing for a finite magnetic field detuning.
Jona-Lasinio
Mattia
M
LENS and Dipartimento di Fisica, Università di Firenze Via Nello Carrara 1, 50019 Sesto Fiorentino, Italy.
Pricoupenko
Ludovic
L