Generation of a CW anti-bunched photon field from a thin-film PPLN waveguide by two-photon interference with a weak coherent state

2025/08/13 by Li, Yue, Li, Haochuan, Lei, Yuhang +7
#FOS: Physical sciences #Quantum Physics (quant-ph)

paper · doi:10.48550/arxiv.2508.10135

Abstract

An anti-bunched photon field is produced from a thin-film ppln waveguide by mixing the on-chip two-photon state with a weak but matched coherent state. This is achieved by taking out the two-photon part of the coherent state via a destructive two-photon interference with the on-chip two-photon state. We achieve a photon rate of 100 kHz with a g2-value of 0.35. This anti-bunched light field will have applications in high-resolution quantum imaging such as long baseline quantum telescopy for enhancing the signal-to-noise ratio.

Citations

• Advancing large-scale thin-film PPLN nonlinear photonics with segmented tunable micro-heaters
• High-efficiency single-photon source above the loss-tolerant threshold for efficient linear optical quantum computing
• Interferometric imaging using shared quantum entanglement

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