Non-linear relaxation of interacting bosons coherently driven on a narrow optical transitionM. Bosch Aguilera, R. Bouganne, A. Dareau, M. Scholl, Q. Beaufils, J. Beugnon and F. GerbierEPL, 123 4 (2018) 40004DOI: https://doi.org/10.1209/0295-5075/123/40004