Noise limits on two-photon interferometric sensing

Scott, Hamish; Branford, Dominic; Westerberg, Niclas; Leach, Jonathan; Gauger, Erik M.

doi:10.1103/physreva.104.053704

Cited by 11 publications

(5 citation statements)

References 39 publications

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“…On the other hand, the FI value can be increased by optimizing the parameters affecting the visibility and the width of the HOM interference dip. Despite the experimental demonstration of nanometer path length (few-attosecond timing) precision [12,21] and a recent theoretical study on the tailoring of the spectral properties [22,23] of photon pairs to achieve precision beyond the value reported in the laboratory condition, the width of the HOM interference dip governed by the bandwidth of the pair photons remained the limiting factor for optimal measurement precision [12,13,24,25] in HOM interferometer based dynamic (realtime) or fast sensing applications. As such, ultra-broadband photon sources have long been hailed as a vital prerequisite for ultraprecise HOM interferometry.…”

Section: Introductionmentioning

confidence: 99%

Near‐Video Frame Rate Quantum Sensing Using Hong–Ou–Mandel Interferometry

Singh,

Kumar,

Sharma

et al. 2023

Adv Quantum Tech

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Hong–Ou–Mandel (HOM) interference, bunching of two indistinguishable photons on a balanced beam‐splitter, has emerged as a promising tool for quantum sensing. There is a need for wide spectral‐bandwidth photon pairs (for high‐resolution sensing) with high brightness (for fast sensing). Here, the generation of photon‐pairs with flexible spectral‐bandwidth even using single‐frequency, continuous‐wave diode laser enabling high‐precision, real‐time sensing is showed. Using 1‐mm‐long periodically‐poled KTP crystal, degenerate, photon‐pairs with spectral‐bandwidth of 163.42±1.68 nm are produced resulting in a HOM‐dip width of 4.01±0.04 m to measure a displacement of 60 nm, and sufficiently high brightness to enable the measurement of vibrations with amplitude of 205 ± 0.75 nm and frequency of 8 Hz. Fisher‐information (FI) and maximum likelihood estimation enables optical delay measurements as small as 4.97 nm with precision (Cramér–Rao bound) and accuracy of 0.89 and 0.54 nm, respectively, therefore showing HOM sensing capability for real‐time, precision‐augmented, in‐field quantum sensing applications.

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Section: Introductionmentioning

confidence: 99%

Near‐Video Frame Rate Quantum Sensing Using Hong–Ou–Mandel Interferometry

Singh,

Kumar,

Sharma

et al. 2023

Adv Quantum Tech

View full text Add to dashboard Cite

show abstract

“…On the other hand, the FI value can be increased by optimizing the parameters affecting the visibility and the width of the HOM interference dip. Despite the experimental demonstration of nanometer path length (few-attosecond timing) precision [12,21] and a recent theoretical study on the tailoring of the spectral properties [22,23] of photon pairs to achieve precision beyond the value reported in the laboratory condition, the width of the HOM interference dip governed by the spectral bandwidth of the pair photons remained the limiting factor for optimal measurement precision [12,13,24,25] in HOM interferometer based dynamic (real-time) or fast sensing applications. As such, ultra-broadband photon sources have long been hailed as a vital prerequisite for ultra-precise HOM interferometry.…”

Section: Introductionmentioning

confidence: 99%

Near-video frame rate quantum sensing using Hong-Ou-Mandel interferometry

Singh¹,

Kumar²,

Sharma³

et al. 2023

Preprint

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Hong-Ou-Mandel (HOM) interference, bunching of two indistinguishable photons on a balanced beam-splitter, has emerged as a promising tool for quantum sensing. There is a need for wide spectral-bandwidth photon pairs (for high-resolution sensing) with high brightness (for fast sensing). Here we show the generation of photon-pairs with flexible spectral bandwidth even using single-frequency, continuous-wave diode laser enabling high-precision, real-time sensing. Using 1-mm-long periodically-poled KTP crystal, we produced degenerate photon-pairs with a spectral bandwidth of 163.42±1.68 nm resulting in a HOM-dip width of 4.01±0.04 μm to measure a displacement of 60 nm, and sufficiently high brightness to enable the measurement of vibrations with an amplitude of 205 ± 0.75 nm and frequency of 8 Hz. Fisher-information and maximum likelihood estimation enables optical delay measurements as small as 4.97 nm with precision (Cramér-Rao bound) and accuracy of 0.89 and 0.54 nm, respectively, therefore showing HOM sensing capability for real-time, precision-augmented, in-field quantum sensing applications

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“…In noisy environments, however, it is difficult to provide the phase stability needed for these techniques. A HOM interferometer is sensitive only to * kjordan@uottawa.ca the group delay of the photons rather than their phase shifts, and is immune to some forms of chromatic dispersion [15], making it a promising candidate for precision measurements in noisy or dispersive environments [16].…”

Section: Introductionmentioning

confidence: 99%

“…Our analysis focuses on the classical and quantum Fisher information, which are used to find the optimal timing precision of a particular measurement scheme and of any physical measurement, respectively. Analysis of this kind has been conducted in past work [7,8,16,17], with the key conclusion that HOM interferometry is an optimal measurement of the relative photon delay, and that the precision is limited by the bandwidth of the probe photons, rather than their mean wavelength. To date, these metrological studies have focused exclusively on two-photon states in which each photon has the same bandwidth, and which share maximal anticorrelations in frequency.…”

Section: Introductionmentioning

confidence: 99%

Quantum metrology timing limits of the Hong-Ou-Mandel interferometer and of general two-photon measurements

Jordan¹,

Abrahão²,

Lundeen³

2022

Preprint

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We examine the precision limits of Hong-Ou-Mandel (HOM) timing measurements, as well as precision limits applying to generalized two-photon measurements. As a special case, we consider the use of two-photon measurements using photons with variable bandwidths and frequency correlations. When the photon bandwidths are not equal, maximizing the measurement precision involves a trade-off between high interference visibility and strong frequency anticorrelations, with the optimal precision occuring when the photons share non-maximal frequency anticorrelations. We show that a generalized measurement has precision limits that are qualitatively similar to those of the HOM measurement whenever the generalized measurement is insensitive to the net delay of both photons. By examining the performance of states with more general frequency distributions, our analysis allows for engineering of the joint spectral amplitude for use in realistic situations, in which both photons may not have ideal spectral properties.

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Noise limits on two-photon interferometric sensing

Cited by 11 publications

References 39 publications

Near‐Video Frame Rate Quantum Sensing Using Hong–Ou–Mandel Interferometry

Near‐Video Frame Rate Quantum Sensing Using Hong–Ou–Mandel Interferometry

Near-video frame rate quantum sensing using Hong-Ou-Mandel interferometry

Quantum metrology timing limits of the Hong-Ou-Mandel interferometer and of general two-photon measurements

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