Fig. 5: High-dimensional quantum interference. | npj Quantum Information

Fig. 5: High-dimensional quantum interference.

From: On-chip parallel processing of quantum frequency comb

Fig. 5

a Schematic of the measurement setup for high-dimensional Hong-Ou-Mandel effect. ODL, optical delay line; BS: beamsplitter; PF: programmable filter. b Normalized coincidence rate between the two SNSPDs with photon pairs in the degenerate resonance. c Normalized coincidence rate between the two SNSPDs with photon pairs from first five resonance pairs. Theoretical envelop of the coincidence rate is also plotted. d Measured coincidence rate (black dot) and theoretical calculation (red) near zero time delay in (c). e Measured coincidence rate (black dot) and theoretical calculation (blue) at time delay around 1.1 ns in (c). Error bars are estimated by assuming the Poisson distribution of photon counting.

Back to article page