Fig. 3: Estimated and calculated photoelectron quantum state in helium.
a, The density matrix reconstructed from the experimental data. b, The density matrix reconstructed from the experimental data, accounting for the spectrometer response function in the retrieval algorithm. c, The density matrix predicted by RRPAE using the KRAKEN technique. d, The density matrix predicted by RRPAE for one-photon ionization. For more details on c and d, see equations (3) and (4) in the. The colour bar scale is common to all the panels.
