A single 4D-STEM scan per setting reconstructs the mixed quantum state of a programmable electron vortex phase plate, showing purity falling from 0.47 to 0.24 with bias.
Grillo et al., Observation of nanoscale magnetic fields using twisted electron beams, Nature Communications 8, 689 (2017)
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Transverse quantum-state characterization of programmable electron optics
A single 4D-STEM scan per setting reconstructs the mixed quantum state of a programmable electron vortex phase plate, showing purity falling from 0.47 to 0.24 with bias.