Figure 5: Simulation showing the dynamical preparation of the chiral spin superfluid state.
From: Chiral magnetism and spontaneous spin Hall effect of interacting Bose superfluids
(a) The occupation fraction in the ground and excited bands, ng and ne, obtained by projecting the time-dependent wavefunction to the eigenmodes of H2band (see Methods). The time unit is TDirac≈4πℏ/(3λ). (b) The difference between the momentum distributions of the two spin components n↑(k)−n↓(k) in the excited band at time TDirac. In our simulation, we choose ΔD=3t and λ=0.2t. The spread of the momentum distribution difference over a finite momentum range is due to the harmonic trap.
