Fig. 1: Muon site and muon–nuclear entanglement.
From: Many-body quantum muon effects and quadrupolar coupling in solids
a Pristine α–N2 crystal structure in a 2 × 2 × 2 supercell. See also Supplementary Movie 1. b Classical muon μ+ (green) in α–N2 induces an electric-dipole polaron (shading) around a linear [N2–μ–N2]+ complex. Sphere size/color gives the induced Mulliken charge of nitrogen ions. See also Supplementary Movie 2. c Induced N2 Mulliken electric dipole moments (blue) and degree of muon-nuclear positional entanglement c [Eq. (1)] from path-integral molecular dynamics (PIMD; red). Solid lines are exponential fits, dashed line/shading indicates the polaron size. c error bars represent a systematic uncertainty of one standard deviation (see Methods).
