Multiparticle Interference of Pairwise Distinguishable Photons

Jones, Alex E.; Menssen, Adrian J.; Chrzanowski, Helen M.; Wolterink, Tom A. W.; Shchesnovich, V. S.

doi:10.1103/physrevlett.125.123603

Cited by 36 publications

(26 citation statements)

References 37 publications

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“…Adding more photons leads to more pairwise distinguishabilities and additional multiparticle phases with a similar form. For N pure photons, with one photon per external state, at most (N − 1) 2 real parameters describe their distinguishability [13,16].…”

Section: Distinguishable and Mixed Statesmentioning

confidence: 99%

“…Extensive theoretical and experimental work has been developed for analysing the effect of photon distinguishability in computationally demanding tasks like boson sampling [10][11][12][13][14][15][16][17][18][19]. A common approach to quantifying similarity of photons is to perform a Hong-Ou-Mandel (HOM) interference test between pairs of them.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Distinguishability and mixedness in quantum interference

Jones¹,

Kumar²,

D'Aurelio³

et al. 2022

Preprint

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We study the impact of distinguishability and mixedness -two fundamental properties of quantum states -on quantum interference. We show that these can influence the interference of multiple particles in different ways, leading to effects that cannot be observed in the interference of two particles alone. This is demonstrated experimentally by interfering three independent photons in pure and mixed states and observing their different multiphoton interference, despite exhibiting the same two-photon Hong-Ou-Mandel (HOM) interference. Besides its fundamental relevance, our observation has important implications for quantum technologies relying on photon interference.

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Section: Distinguishable and Mixed Statesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Distinguishability and mixedness in quantum interference

Jones¹,

Kumar²,

D'Aurelio³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…To work around this problem, researchers tend to work in the so-called low-squeezing regime, i.e. 𝑛 → 0, to minimize the contribution of such higher order-terms [14][15][16]. The increasing demand for higher photon rates to conduct experiments involving a growing number of photons [17][18][19] restricts the possibility of working in this regime.…”

Section: Introductionmentioning

confidence: 99%

Reducing $g^{(2)}(0)$ of a parametric down-conversion source via photon-number resolution with superconducting nanowire detectors

Sempere-Llagostera,

Thekkadath,

Patel

et al. 2021

Preprint

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Multiphoton contributions pose a significant challenge for the realisation of heralded single-photon sources (HSPS) based on nonlinear processes. In this work, we improve the quality of single photons generated in this way by harnessing the photon-number resolving (PNR) capabilities of commercial superconducting nanowire single-photon detectors (SNSPDs). We report a 13 ± 0.4% reduction in the intensity correlation function 𝑔 (2) (0) even with a collection efficiency in the photon source of only 29.6%. Our work demonstrates the first application of the PNR capabilities of SNSPDs and shows improvement in the quality of an HSPS with widely available technology.

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“…→ 0, to minimize the contribution of such higher order-terms [14][15][16]. The increasing demand for higher photon rates to conduct experiments involving a growing number of photons [17][18][19] restricts the possibility of working in this regime.…”

Section: Introductionmentioning

confidence: 99%

Reducing g(2)(0) of a Parametric Down-Conversion Source via Photon-Number Resolution with Superconducting Nanowire Detectors

Sempere-Llagostera

Thekkadath²,

Patel³

et al. 2021

Quantum Information and Measurement VI 2021

View full text Add to dashboard Cite

Multiphoton contributions pose a significant challenge for the realisation of heralded single-photon sources (HSPS) based on nonlinear processes. In this work, we improve the quality of single photons generated in this way by harnessing the photon-number resolving (PNR) capabilities of commercial superconducting nanowire single-photon detectors (SNSPDs). We report a 13 ± 0.4% reduction of (2) ( = 0), even with a collection efficiency in the photon source of only 29.6%. Our work demonstrates the first application of the PNR capabilities of SNSPDs and shows improvement in the quality of an HSPS with widely available technology.

show abstract

Multiparticle Interference of Pairwise Distinguishable Photons

Cited by 36 publications

References 37 publications

Distinguishability and mixedness in quantum interference

Distinguishability and mixedness in quantum interference

Reducing $g^{(2)}(0)$ of a parametric down-conversion source via photon-number resolution with superconducting nanowire detectors

Reducing g(2)(0) of a Parametric Down-Conversion Source via Photon-Number Resolution with Superconducting Nanowire Detectors

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