We study the growth of two- and three-body correlations in an ultracold Bose gas quenched to unitarity. This is encoded in the dynamics of the two- and three-body contacts analyzed in this work. Via a set of relations connecting many-body correlation dynamics with few-body models, signatures of the Efimov effect are mapped out as a function of evolution time at unitarity over a range of atomic densities n. For the thermal resonantly interacting Bose gas, we find that atom bunching leads to an enhanced growth of few-body correlations. These atom-bunching effects also highlight the interplay between few-body correlations that occurs before genuine many-body effects enter on Fermi timescales.
Colussi, V. E., van Zwol, B. E., D'Incao, J. P., & Kokkelmans, S. J. J. M. F. (2019). Bunching, clustering, and the buildup of few-body correlations in a quenched unitary Bose gas. Physical Review A, 99(4), . https://doi.org/10.1103/PhysRevA.99.043604