Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Science in China Series A Mathematics

Sub-shot-noise measurement for slight absorption

Hai Wang, Qing Pan, Yun Zhang, Chenyang Xue, Changde Xie, Kunchi Peng

Published May 1, 1998• 5 citations
Publisher
DOI
10.1007/bf02879943

Related papers

Sub shot noise phase measurement without a separate local oscillator

Glockl, Andersen, Korolkova +1 more

Conference on Lasers and Electro-Optics•Jan 1, 2004•0 citations

Sub-Shot-Noise Interferometry

Jungsang Kim, Seema Somani, Y. Yamamoto

Springer series in photonics•Jan 1, 2001•0 citations

Superresolution concentration measurement realized by sub-shot-noise absorption spectroscopy

Korenobu Matsuzaki, Tahei Tahara

Absorption spectroscopy is one of the most widely used spectroscopic methods. The signal-to-noise ratio in conventional absorption spectroscopy is ultimately limited by the shot noise, which arises from the statistical property of the light used for the measurement. Here we show that the noise in absorption spectra can be suppressed below the shot-noise limit when entangled photon pairs are used for the light source. By combining broadband entangled photon pairs and multichannel detection, we realize the acquisition of sub-shot-noise absorption spectra in the entire visible wavelength. Furthermore, we demonstrate the strength of sub-shot-noise absorption spectroscopy for the identification and quantification of chemical species, which are two primary aims of absorption spectroscopy. For highly diluted binary mixture solutions, sub-shot-noise absorption spectroscopy enables us to determine the concentration of each chemical species with precision beyond the limit of conventional absorption spectroscopy. That is, sub-shot-noise absorption spectroscopy achieves superresolution in concentration measurements.

Nature Communications•Feb 17, 2022•13 citations

Overcoming inefficient detection in sub-shot-noise absorption measurement and imaging

E. Knyazev, Farid Ya Khalili, Maria V. Chekhova

Photon-number squeezing and correlations enable measurement of absorption with an accuracy exceeding that of the shot-noise limit. However, sub-shot noise imaging and sensing based on these methods require high detection efficiency, which can be a serious obstacle if measurements are carried out in "difficult" spectral ranges. We show that this problem can be overcome through the phase-sensitive amplification before detection. Here we propose an experimental scheme of sub-shot-noise imaging with tolerance to detection losses.

arXiv:1810.08115•Optics Express•Mar 4, 2019•28 citations

Sub-Shot-Noise FM Noise Spectroscopy

Jungsang Kim, Seema Somani, Y. Yamamoto

Springer series in photonics•Jan 1, 2001•0 citations

Sub-Shot-Noise FM Spectroscopy

Jungsang Kim, Seema Somani, Y. Yamamoto

Springer series in photonics•Jan 1, 2001•0 citations
Absorption spectroscopy is one of the most widely used spectroscopic methods. The signal-to-noise ratio in conventional absorption spectroscopy is ultimately limited by the shot noise, which arises from the statistical property of the light used for the measurement. Here we show that the noise in absorption spectra can be suppressed below the shot-noise limit when entangled photon pairs are used for the light source. By combining broadband entangled photon pairs and multichannel detection, we realize the acquisition of sub-shot-noise absorption spectra in the entire visible wavelength. Furthermore, we demonstrate the strength of sub-shot-noise absorption spectroscopy for the identification and quantification of chemical species, which are two primary aims of absorption spectroscopy. For highly diluted binary mixture solutions, sub-shot-noise absorption spectroscopy enables us to determine the concentration of each chemical species with precision beyond the limit of conventional absorption spectroscopy. That is, sub-shot-noise absorption spectroscopy achieves superresolution in concentration measurements.
Photon-number squeezing and correlations enable measurement of absorption with an accuracy exceeding that of the shot-noise limit. However, sub-shot noise imaging and sensing based on these methods require high detection efficiency, which can be a serious obstacle if measurements are carried out in "difficult" spectral ranges. We show that this problem can be overcome through the phase-sensitive amplification before detection. Here we propose an experimental scheme of sub-shot-noise imaging with tolerance to detection losses.