Quantum Enhanced Precision Estimation of Transmission with Bright Squeezed Light

Atkinson, George; Allen, Euan J.; Ferranti, Giacomo; McMillan, Alex; Matthews, Jonathan C. F.

doi:10.1103/physrevapplied.16.044031

Cited by 20 publications

(10 citation statements)

References 38 publications

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“…The importance of quantum enhanced transmission estimation has led to recent experimental works that demonstrated that a quantum advantage is possible [44][45][46][47][48][49][50]. As opposed to previous experiments, we show for the first time that it is possible to perform measurements that saturate the QCRB for transmission estimation over a broad range of transmission levels (limited only by our accessible transmission through the system) and do so without any free parameters.…”

Section: Introductionmentioning

confidence: 58%

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Transmission estimation at the quantum Cramér-Rao bound with macroscopic quantum light

Woodworth

Hermann-Avigliano

Chan

et al. 2022

EPJ Quantum Technol.

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The field of quantum metrology seeks to apply quantum techniques and/or resources to classical sensing approaches with the goal of enhancing the precision in the estimation of a parameter beyond what can be achieved with classical resources. Theoretically, the fundamental minimum uncertainty in the estimation of a parameter for a given probing state is bounded by the quantum Cramér-Rao bound. From a practical perspective, it is necessary to find physical measurements that can saturate this fundamental limit and to show experimentally that it is possible to perform measurements with the required precision to do so. Here we perform experiments that saturate the quantum Cramér-Rao bound for transmission estimation over a wide range of transmissions when probing the system under study with a continuous wave bright two-mode squeezed state. To properly take into account the imperfections in the generation of the quantum state, we extend our previous theoretical results to incorporate the measured properties of the generated quantum state. For our largest transmission level of 84%, we show a 62% reduction over the optimal classical protocol in the variance in transmission estimation when probing with a bright two-mode squeezed state with −8 dB of intensity-difference squeezing. Given that transmission estimation is an integral part of many sensing protocols, such as plasmonic sensing, spectroscopy, calibration of the quantum efficiency of detectors, etc., the results presented promise to have a significant impact on a number of applications in various fields of research.

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Section: Introductionmentioning

confidence: 58%

“…For example, for the case of a single-mode squeezed state, recent work by Atkinson et. al [49] was only assumed to saturate the QCRB given measured trends. An absolute comparison between the measured uncertainty and the theoretical absolute uncertainty given by the QCRB was not performed.…”

Section: Introductionmentioning

confidence: 99%

Transmission estimation at the quantum Cramér-Rao bound with macroscopic quantum light

Woodworth

Hermann-Avigliano

Chan

et al. 2022

EPJ Quantum Technol.

View full text Add to dashboard Cite

show abstract

“…TMSV states have the same QFIM as Fock states to lowest order in 𝐻, making them similarly useful in the limit of small 𝑞 and small 𝐻 for providing quantum advantages, which has indeed been demonstrated (Atkinson et al, 2021;D Auria et al, 2006;Shi et al, 2020;Souto Ribeiro et al, 1997;Tapster et al, 1991).…”

Section: Attenuationmentioning

confidence: 90%

Quantum Polarimetry

Goldberg

2021

Preprint

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Polarization is one of light's most versatile degrees of freedom for both classical and quantum applications. The ability to measure light's state of polarization and changes therein is thus essential; this is the science of polarimetry. It has become ever more apparent in recent years that the quantum nature of light's polarization properties is crucial, from explaining experiments with single or few photons to understanding the implications of quantum theory on classical polarization properties. We present a self-contained overview of quantum polarimetry, including discussions of classical and quantum polarization, their transformations, and measurements thereof. We use this platform to elucidate key concepts that are neglected when polarization and polarimetry are considered only from classical perspectives.

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“…The fourth route to observable Kerr squeezing in a fibre was to follow the proposal by Kitagawa and Yamamoto [49] and use an asymmetric Sagnac loop to displace the squeezing ellipse in phase space such that the short axis lines up with the amplitude quadrature [50], [51], [52]. The scheme was recently used for precision transmission measurements [53]. All the Sagnac interferometer set-ups have the common problem that at most locations along the fibre, the counter propagating fields probe the GAWBS at different times, so some degradation because of GAWBS is persisting.…”

Section: State Of Kerr Effect Squeezing Of Lightmentioning

confidence: 99%

Observation of robust polarization squeezing via the Kerr nonlinearity in an optical fibre

Калинин¹,

Dirmeier²,

Сорокин³

et al. 2022

Preprint

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Squeezed light is one of the resources of photonic quantum technology. Among the various nonlinear interactions capable of generating squeezing, the optical Kerr effect is particularly easy-to-use. A popular venue is to generate polarization squeezing, which is a special self-referencing variant of two-mode squeezing. To date, polarization squeezing generation setups have been very sensitive to fluctuations of external factors and have required careful tuning. In this work, we report on a development of a new all-fibre setup for polarization squeezing generation. The setup consists of passive elements only and is simple, robust, and stable. We obtained more than 5 dB of directly measured squeezing over long periods of time without any need for adjustments. Thus, the new scheme provides a robust and easy to set up way of obtaining squeezed light applicable to different applications. We investigate the impact of pulse duration and pulse power on the degree of squeezing.

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Quantum Enhanced Precision Estimation of Transmission with Bright Squeezed Light

Cited by 20 publications

References 38 publications

Transmission estimation at the quantum Cramér-Rao bound with macroscopic quantum light

Transmission estimation at the quantum Cramér-Rao bound with macroscopic quantum light

Quantum Polarimetry

Observation of robust polarization squeezing via the Kerr nonlinearity in an optical fibre

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