Fig. 4
From: Dissipative shock waves generated by a quantum-mechanical piston
Isosurfaces of 3D numerical simulation. A piston front (rightmost, non-transparent green plane) sweeping into an elongated BEC at vp = 2.44 mm s−1. The shock front (leftmost, blue transparent plane) propagates through the BEC over time. At time t = 58 ms, only the shock front plane is shown. In the plateau region between the two planes, vortex tangles are generated. The isosurface density value is 0.1 ⋅ Γ, semi-transparent for \(\sqrt {x^2 + y^2} > 2.39\,\mu {\mathrm{m}}\) to visualize the BEC interior
