Figure 2

Time evolution of the system in three different parameter regimes.

Three snapshots (columns) of the evolving two-component Bose gas for three different values of the coupling ratio α (rows) are shown. In each case we show the spatial distribution of density imbalance S^z as well as the momentum distribution n(k) as a function of the momentum modulus k of particles in the gas. Tick labels for the spectra graphs are the same as in Figure 3. Until t_I the dynamics is characterised by the instability and isotropisation of density fluctuations. At t_NTFP = 10 t_I, one observes the development of different power laws in the momentum distributions. They remain metastable for a long time beyond t_F = 100 t_I and reveal different non-thermal fixed points. The change of power laws at α = 1 indicates a dynamical transition.