Ultrasensitive velocity estimation via cyclic weak measurement

Fang, Sen-Zhi; Zhu, Li; Jin, Rui-Bo; Tan, Hua-Tang; Li, Gao‐xiang; Wu, Qing

doi:10.1016/j.optcom.2019.125117

Cited by 8 publications

(3 citation statements)

References 18 publications

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“…In our signal recycling scheme, we form a resonant cavity by introducing a partially transmitting mirror. Unlike the power recycling weak value scheme [25][26][27]31] in which the partially transmitting mirror is at the bright port, here we place the mirror at the dark port of the Michelson interferometer, i.e., in front of the detector. We will show that this cavity in our signal recycling scheme can also improve the number of detected photons and the corresponding SNR like the power recycling scheme.…”

Section: Signal Recyclingmentioning

confidence: 99%

“…We now compare the signal recycling scheme with the power recycling scheme. [31] Since the detected light in the signal recycling scheme is the same as that in the power recycling scheme, we now focus the light reflected back to the laser and in the cavity. It is easy to calculate the reflected light in the signal recycling scheme as follows:…”

Section: Comparison With Power Recycling Weak Measurementmentioning

confidence: 99%

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Signal-recycled weak measurement for ultrasensitive velocity estimation*

Fang¹,

Yang²,

Tan³

et al. 2021

Chinese Phys. B

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Weak value amplification has shown its superiority in measurement of small physical effects. Here we introduce a signal-recycled weak-value-based velocity measurement strategy to decrease the attenuation of detected photons during the post-selection. Like the power-recycled scheme, we can improve the number of detected photons and signal-to-noise ratio of velocity by forming a cavity. However, optimal improvements of number of detected photons and signal-to-noise ratio cannot be obtained simultaneously in our signal-recycled scheme owing to the walk-off effect. Furthermore, we find that the reflected light is relatively strong compared with the power-recycled scheme, which may increase the collection-detection efficiency in prospective relevant experiment.

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Section: Signal Recyclingmentioning

confidence: 99%

Section: Comparison With Power Recycling Weak Measurementmentioning

confidence: 99%

Signal-recycled weak measurement for ultrasensitive velocity estimation*

Fang¹,

Yang²,

Tan³

et al. 2021

Chinese Phys. B

Self Cite

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show abstract

“…Note that the technique we presented here is a kind of power recycling (see e.g. [26]), based on discrete pulse trapping (see also recent theory work [27]); a complementary method of doing the same thing uses passive optical cavities to boost the number of photons undergoing weak-value amplification [28][29][30]. Our proof-of-principle experiment shows a promising way forward to further improve on the already excellent performance of weak-value amplification experiments.…”

mentioning

confidence: 99%

Enhanced weak-value amplification via photon recycling

Krafczyk,

Jordan,

Goggin

et al. 2021

Preprint

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In a quantum-noise limited system, weak-value amplification using post-selection normally does not produce more sensitive measurements than standard methods for ideal detectors: the increased weak value is compensated by the reduced power due to the small post-selection probability. Here we experimentally demonstrate recycled weak-value measurements using a pulsed light source and optical switch to enable nearly deterministic weak-value amplification of a mirror tilt. Using photon counting detectors, we demonstrate a signal improvement by a factor of 4.4 ± 0.2 and a signal-tonoise ratio improvement of 2.10 ± 0.06, compared to a single-pass weak-value experiment, and also compared to a conventional direct measurement of the tilt. The signal-to-noise ratio improvement could reach around 6 for the parameters of this experiment, assuming lower loss elements.

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Simultaneous sensing axial and radial magnetic fields based on weak measurement

Zhong

Guan

et al. 2021

Optics Communications

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Ultrasensitive velocity estimation via cyclic weak measurement

Cited by 8 publications

References 18 publications

Signal-recycled weak measurement for ultrasensitive velocity estimation*

Signal-recycled weak measurement for ultrasensitive velocity estimation*

Enhanced weak-value amplification via photon recycling

Simultaneous sensing axial and radial magnetic fields based on weak measurement

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