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Stabilizer formalism in linear optics and application to Bell-state discrimination

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arxiv 2301.06551 v1 pith:HQWR2EEU submitted 2023-01-16 quant-ph

Tomohiro Yamazaki , Rikizo Ikuta , Takashi Yamamoto This is my paper · ORCID
classification quant-ph
keywords bell-statediscriminationlinearphotonsanalyzeancillacircuitsformalism
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abstract

We propose a framework to analyze linear optical circuits based on an analogy with stabilizer formalism in quantum circuits, which provides efficiently computable formulas related to state discriminations. Hence, we analyze a Bell-state discrimination scheme with linear optics and ancillary single photons. With an increasing number of ancilla photons, the success probability of Bell-state discrimination has a maximum of $\frac{403}{512} \simeq 0.787$ at $28$ ancilla photons. By contrast, the corresponding two-qubit measurement asymptotically approaches a maximally entangling measurement.

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  1. Statistical-noise-enhanced multi-photon interference

    quant-ph 2026-01 conditional novelty 6.0 of 10

    In a symmetric three-photon Fourier interferometer, engineered super-Poissonian light with g(2)≈1.9 and g(3)≈3.6 maximizes visibility at ≈0.61, surpassing the magnitude of the single-photon value.

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