Fig. 3: | Communications Physics

Fig. 3

From: Dynamical equilibration across a quenched phase transition in a trapped quantum gas

Fig. 3

Condensate growth dynamics. ad Comparison of dynamical simulations (filled symbols, solid lines) and experimental data (open black circles, dashed lines) for different cooling rates, labelled here by the rate of change of temperature with time (dT/dt). Each subplot shows a complete averaged experimental sequence of condensate atom number N0 for a particular quench rate, with the depicted averaged numerical results corresponding to quench rates at either side of the experimental values. In the simulations we assume a fixed initial (T = 790 nK > Tc, N = 22 × 106 atoms) and final equilibrium (T = 210 nK < Tc, N = 6.6 × 106 atoms) states. We also fit the numerical data with an S-shaped function (see Methods) to extract the growth timescale τG. e Dependence of τG on the ramp duration τR in the simulations, with error bars representing the 95% confidence bounds of the fits. f Condensation onset time, tbec, as a function of τR, demonstrating that slower quenches feature a delayed onset. Error bars here represent the difference in time for the condensate atom number to reach 3% (lower bound) or 7% of the total final atom number