Extended Data Fig. 2: Build-up of transversal spin in momentum space.
From: Observation of universal dynamics in a spinor Bose gas far from equilibrium
Since the angular orientation θ cannot be extracted reliably for short evolution times, we choose to show the Fourier transform of the transversal spin for regimes 1–3 (see Fig. 1). The initial condition, all atoms prepared in mF = 0, is characterized by a flat distribution. There is a fast build-up of long-wavelength spin excitations by more than two orders of magnitude within the first second. This process is followed by a redistribution of momenta leading to the scaling form for times longer than 4 s.
