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Purifying photon indistinguishability through quantum interference

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arxiv 2403.12866 v2 pith:5VHIRBDW submitted 2024-03-19 quant-ph

Carlos F.D. Faurby , Lorenzo Carosini , Huan Cao , Patrik I. Sund , Lena M. Hansen , Francesco Giorgino , Andrew B. Villadsen , Stefan N. van den Hoven
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Peter Lodahl Stefano Paesani Juan C. Loredo Philip Walther
This is my paper · ORCID
classification quant-ph
keywords indistinguishabilityphotonspurifiedquantuminterferencephotonregimeancillary
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abstract

Indistinguishability between photons is a key requirement for scalable photonic quantum technologies. We experimentally demonstrate that partly distinguishable single photons can be purified to reach near-unity indistinguishability by the process of quantum interference with ancillary photons followed by heralded detection of a subset of them. We report on the indistinguishability of the purified photons by interfering two purified photons and show improvements in the photon indistinguishability of $2.774(3)$\% in the low-noise regime, and as high as $10.2(5)$ \% in the high-noise regime.

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Forward citations

Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Error Mitigation in Bosonic Systems via Virtual Distillation

    quant-ph 2026-07 accept novelty 6.0 of 10

    Passive linear interferometers implement virtual distillation for bosonic observables, recovering noise-suppressed number, phase-shift and quadrature expectations under loss and dephasing.

  2. Quantum advantage for single-photon state characterization

    quant-ph 2025-12 conditional novelty 6.0 of 10

    A multiphoton interference protocol gives more Fisher information about pairwise photon overlaps per detection event than pairwise Hong-Ou-Mandel measurements, demonstrated experimentally for three photons.

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