Quantum optical metrology in the lossy SU(2) and SU(1,1) interferometers

Gao, Yang

doi:10.1103/physreva.94.023834

Cited by 18 publications

(7 citation statements)

References 25 publications

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“…Finally, we address the degrading effects owing to the experimental imperfections, extending our treatment to include these in the analysis of the FI. In most interesting cases, the photon-loss process, determined by a given strength η loss , and the nonunit efficiency detection, designated by η eff , can be regarded as the major limits to interferometric precision [21,22,25,26,28,38,55,56,[81][82][83][84]. Furthermore, it is customary to assume that the environmental noise and photonloss mechanism act identically and independently upon each probe mode [85], and that the environment is in a thermal state at a temperature determined by the mean photon number n th .…”

Section: Photon-loss Effects and Nonunit Efficiency Detectionmentioning

confidence: 99%

Gaussian phase sensitivity of boson-sampling-inspired strategies

Valido

García-Ripoll

2021

Phys. Rev. A

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In this paper we study the phase sensitivity of generic linear interferometric schemes using Gaussian resources and measurements. Our formalism is based on the Fisher information. This allows us to separate the contributions of the measurement scheme, the experimental imperfections, and auxiliary systems. We demonstrate the strength of this formalism using a broad class of multimode Gaussian states that includes well-known results from single-and two-mode metrology scenarios. Using this, we prove that input coherent states or squeezing improve upon the nonclassical states proposed in preceding boson-sampling-inspired phase-estimation schemes. We also develop a polychromatic interferometric protocol, demonstrating an enhanced sensitivity with respect to two-mode squeezed-vacuum states, for which the ideal homodyne detection is formally shown to be optimal.

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Section: Photon-loss Effects and Nonunit Efficiency Detectionmentioning

confidence: 99%

Gaussian phase sensitivity of boson-sampling-inspired strategies

Valido

García-Ripoll

2021

Phys. Rev. A

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show abstract

“…Finally, we address the degrading effects owning to the experimental imperfections, extending our treatment to include these in the analysis of the FI. In most interesting cases, the photon-loss process, determined by a given strength η loss , and the nonunit-efficiency detection, designated by η eff , can be regarded as the major limits to interferometric precision [17,18,21,23,34,50,51,[75][76][77][78]. Furthermore, it is customary to assume that the environmental noise and photon-loss mechanism act identically and independently upon each probe mode [79], as well as the environment is in a thermal state at a temperature determined by the mean photon number n th .…”

Section: Photon-loss Effects and Nonunit-efficiency Detectionmentioning

confidence: 99%

Gaussian phase sensitivity of boson-sampling-inspired strategies

Valido,

García-Ripoll

2020

Preprint

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In this work we study the phase sensitivity of generic linear interferometric schemes using Gaussian resources and measurements. Our formalism is based on the Fisher information. This allows us to separate the contributions of the measurement scheme, the experimental imperfections, and auxiliary systems. We demonstrate the strength of this formalism using a broad class of multimode Gaussian states that includes well-known results from single-and two-mode metrology scenarios. Using this, we prove that input coherent states or squeezing beat the non-classical states proposed in preceding boson-sampling-inspired phase-estimation schemes. We also develop a novel polychromatic interferometric protocol, demonstrating an enhanced sensitivity with respect to two-mode squeezed-vacuum states, for which the ideal homodyne detection is formally shown to be optimal.

show abstract

“…In optical interferometry, a coherent-light-based strategy is most commonly used but its sensitivity for phase estimation is shot-noise limited, namely ϕ 2 N −1 . If one needs to achieve a finer precision given a finite amount of resources, one has to resort to interferometry with nonclassical states, such as the coherent squeezed state [9], two-mode squeezedvacuum [10,11], NOON states [12], and squeezed vacuum states [13][14][15]. For works relating to Gaussian state quantum metrology, see, e.g., Refs.…”

Section: Introductionmentioning

confidence: 99%