Fig. 3 | Nature Communications

Fig. 3

From: Above-threshold scattering about a Feshbach resonance for ultracold atoms in an optical collider

Fig. 3

Collision between a projectile test particle and a target cloud. Phase-space representations of an incident test particle with momentum \({p_{\rm{p}}}\hat {\bf{z}}\) moving in the phase-space diagram and colliding with a stationary target cloud. a Harmonically trapped target cloud and an incident test particle of momentum p p as indicated by the arrow. b Target cloud after some time of ballistic expansion. ce On transit, the test particle can only remove atoms from within a horizontal strip in the phase-space distribution of the target cloud centered at p t = p p − Δp res(B). Depending on the value of B the strip may be below (c), on (d), or above the z-axis (e). In all panels ae the marginal spatial density distributions n t(z,τ) of the target cloud are shown at the bottom (red line). Panels ce also shows n t(z,τ) just before the collision (orange line)