A practical model of twin-beam experiments for sub-shot-noise absorption measurements

Jason D Mueller; Nigam Samantaray; Jonathan C F Matthews

doi:10.1063/5.0015576

A practical model of twin-beam experiments for sub-shot-noise absorption measurements

Jason D Mueller^*
, Nigam Samantaray
, Jonathan C F Matthews^*

^*Corresponding author for this work

Research output: Contribution to journal › Article (Academic Journal) › peer-review

5 Citations (Scopus)

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Abstract

Quantum-intensity-correlated twin beams of light can be used to measure absorption with precision beyond the classical shot-noise limit. The degree to which this can be achieved with a given estimator is defined by the quality of the twin-beam intensity correlations, which is quantified by the noise reduction factor. We derive an analytical model of twin-beam experiments, incorporating experimental parameters such as the relative detection efficiency of the beams, uncorrelated optical noise, and uncorrelated detector noise. We show that for twin beams without excessive noise, measured correlations can be improved by increasing the detection efficiency of each beam, notwithstanding this may unbalance detection efficiency. However, for beams with excess intensity or other experimental noise, one should balance detection efficiency, even at the cost of reducing detection efficiency -- we specifically define these noise conditions and verify our results with statistical simulation. This has application in design and optimization of absorption spectroscopy and imaging experiments.

Original language	English
Article number	034001
Number of pages	6
Journal	Applied Physics Letters
Volume	117
Early online date	21 Jul 2020
DOIs	https://doi.org/10.1063/5.0015576
Publication status	E-pub ahead of print - 21 Jul 2020

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QETLabs
Bristol Quantum Information Institute

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10.1063/5.0015576

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This is the author accepted manuscript (AAM). The final published version (version of record) is available online via AIP Publishing at https://doi.org/10.1063/5.0015576 . Please refer to any applicable terms of use of the publisher.
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This is the author accepted manuscript (AAM). The final published version (version of record) is available online via AIP Publishing at https://doi.org/10.1063/5.0015576 . Please refer to any applicable terms of use of the publisher.
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title = "A practical model of twin-beam experiments for sub-shot-noise absorption measurements",

abstract = "Quantum-intensity-correlated twin beams of light can be used to measure absorption with precision beyond the classical shot-noise limit. The degree to which this can be achieved with a given estimator is defined by the quality of the twin-beam intensity correlations, which is quantified by the noise reduction factor. We derive an analytical model of twin-beam experiments, incorporating experimental parameters such as the relative detection efficiency of the beams, uncorrelated optical noise, and uncorrelated detector noise. We show that for twin beams without excessive noise, measured correlations can be improved by increasing the detection efficiency of each beam, notwithstanding this may unbalance detection efficiency. However, for beams with excess intensity or other experimental noise, one should balance detection efficiency, even at the cost of reducing detection efficiency -- we specifically define these noise conditions and verify our results with statistical simulation. This has application in design and optimization of absorption spectroscopy and imaging experiments.",

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language = "English",

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journal = "Applied Physics Letters",

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T1 - A practical model of twin-beam experiments for sub-shot-noise absorption measurements

AU - Mueller, Jason D

AU - Samantaray, Nigam

AU - Matthews, Jonathan C F

PY - 2020/7/21

Y1 - 2020/7/21

N2 - Quantum-intensity-correlated twin beams of light can be used to measure absorption with precision beyond the classical shot-noise limit. The degree to which this can be achieved with a given estimator is defined by the quality of the twin-beam intensity correlations, which is quantified by the noise reduction factor. We derive an analytical model of twin-beam experiments, incorporating experimental parameters such as the relative detection efficiency of the beams, uncorrelated optical noise, and uncorrelated detector noise. We show that for twin beams without excessive noise, measured correlations can be improved by increasing the detection efficiency of each beam, notwithstanding this may unbalance detection efficiency. However, for beams with excess intensity or other experimental noise, one should balance detection efficiency, even at the cost of reducing detection efficiency -- we specifically define these noise conditions and verify our results with statistical simulation. This has application in design and optimization of absorption spectroscopy and imaging experiments.

AB - Quantum-intensity-correlated twin beams of light can be used to measure absorption with precision beyond the classical shot-noise limit. The degree to which this can be achieved with a given estimator is defined by the quality of the twin-beam intensity correlations, which is quantified by the noise reduction factor. We derive an analytical model of twin-beam experiments, incorporating experimental parameters such as the relative detection efficiency of the beams, uncorrelated optical noise, and uncorrelated detector noise. We show that for twin beams without excessive noise, measured correlations can be improved by increasing the detection efficiency of each beam, notwithstanding this may unbalance detection efficiency. However, for beams with excess intensity or other experimental noise, one should balance detection efficiency, even at the cost of reducing detection efficiency -- we specifically define these noise conditions and verify our results with statistical simulation. This has application in design and optimization of absorption spectroscopy and imaging experiments.

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U2 - 10.1063/5.0015576

DO - 10.1063/5.0015576

M3 - Article (Academic Journal)

SN - 0003-6951

VL - 117

JO - Applied Physics Letters

JF - Applied Physics Letters

M1 - 034001

ER -

A practical model of twin-beam experiments for sub-shot-noise absorption measurements

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