Information extraction in photon-counting experiments

Schapeler, Timon; Bartley, Tim J.

doi:10.1103/physreva.106.013701

Cited by 2 publications

(1 citation statement)

References 23 publications

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“…Each detector or time slot can thus be treated as a bin that receives photons with a certain probability. There are several ways to characterize PNR detectors using information theory [15] and detector tomography [16,17], and previous studies have compared the merits of various multiplexing-based approaches [18,19].…”

Section: Introductionmentioning

confidence: 99%

Photon number resolving detection with a single-photon detector and adaptive storage loop

Sullivan,

Braverman,

Upham

et al. 2024

New J. Phys.

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Photon number resolving (PNR) measurements are beneficial or even necessary for many applications in quantum optics. Unfortunately, PNR detectors are usually large, slow, expensive, and difficult to operate. However, if the input signal is multiplexed, photon “click” detectors, that lack an intrinsic photon number resolving capability, can still be used to realize photon number resolution. Here, we investigate the operation of a single click detector, together with a storage line with tunable outcoupling. Using adaptive feedback to adjust the storage outcoupling rate, the dynamic range of the detector can in certain situations be extended by up to an order of magnitude relative to a purely passive setup. An adaptive approach can thus allow for photon number variance below the quantum shot noise limit under a wider range of conditions than using a passive multiplexing approach. This can enable applications in quantum enhanced metrology and quantum computing.

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Section: Introductionmentioning

confidence: 99%

Photon number resolving detection with a single-photon detector and adaptive storage loop

Sullivan,

Braverman,

Upham

et al. 2024

New J. Phys.

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A 100-pixel photon-number-resolving detector unveiling photon statistics

et al. 2022

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Single-photon detectors are ubiquitous in quantum information science and quantum sensing. They are key enabling technologies for numerous scientific discoveries and fundamental tests of quantum optics. Photon-number-revolving detectors are the ultimate measurement tool of light. However, few detectors to date can provide high-fidelity photon number resolution at few-photon levels. Here, we demonstrate an on-chip detector that can resolve up to 100 photons by spatiotemporally multiplexing an array of superconducting nanowires along a single waveguide. The unparalleled photon number resolution paired with the high-speed response exclusively allows us to unveil the quantum photon statistics of a true thermal light source for the first time, which is realized by direct measurement of high-order correlation function g (N) with N up to 15, observation of photon-subtraction-induced photon number enhancement, and quantum-limited state discrimination against a coherent light source. Our detector provides a viable route towards various important applications, including photonic quantum computation and quantum metrology.

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Information extraction in photon-counting experiments

Cited by 2 publications

References 23 publications

Photon number resolving detection with a single-photon detector and adaptive storage loop

Photon number resolving detection with a single-photon detector and adaptive storage loop

A 100-pixel photon-number-resolving detector unveiling photon statistics

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