Fig. 1

Loss of ground state molecules. Collisional loss of molecules in \(|N = 0,M_N = 0,m_i^{{\mathrm{Rb}}} = 3{\mathrm{/}}2,m_i^{{\mathrm{Cs}}} = 7{\mathrm{/}}2\rangle\) with initial temperature of 1.5(1) μK and peak density 1.9(2) × 10¹¹ cm⁻³. Each result is the mean of at least five experimental runs, with standard error shown. The solid black line shows a fit to the coupled rate equations given in Eq. (2) with 1 standard deviation (σ) uncertainty in γ shaded. The dashed lines show fits to the data with fixed γ = 1, 2 and 3 corresponding to one-, two- and three-body loss, respectively. Inset: Density dependence of the initial loss rate on a log–log scale. The vertical error bars show the 1σ uncertainty in the linear gradient fitted to the first 200 ms of each loss measurement, and the horizontal error bars show the 1σ uncertainty in the density derived from the uncertainties in the starting temperature, number and trap frequencies. The solid line is a linear fit, with 1σ uncertainty in the gradient shaded, while the dashed lines indicate the expectations for one-, two- and three-body loss