Fig. 5: Characterization of multimode coherence and multimode quantization.
From: A generalized multipath delayed-choice experiment on a large-scale quantum nanophotonic chip
a Quantification of the l1-norm quantum coherence \({\tilde{{\mathcal{C}}}}_{l1}\) from the d-path full-wave interference patterns when α is chosen as π. The \({\widetilde{{\mathcal{C}}}}_{l1}\) values are estimated from the visibility by \({{\mathcal{V}}}_{d}(d-1)\), that are directly probed from the d-path interference patterns, without accessing the full density matrix. b Measurement of quantum randomness entropy \({H}_{\min }\) from the d-mode full-particle quantized distributions, when α is chosen as zero. More than one bit of randomness is obtained. The results in a and b are collected in the quantum wave-particle superposition measurement. Red points represent experimental data, while orange lines represent theoretical results. Error bars (±σ) are estimated from photon Poissonian statistics.
