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

Frontiers in Optics

Restoring sub-shot noise phase sensitivity in a realistic two-photon interferometry

Michał Jachura, Radosław Chrapkiewicz, Rafał Demkowicz-Dobrzański, Wojciech Wasilewski, Konrad Banaszek

Published Jan 1, 2015• 0 citations
Publisher

Abstract

We demonstrate experimentally that a careful design of the spatial structure of interfered photons, combined with position-resolved coincidence detection, allows to recover sub-shot-noise phase sensitivity in regime that otherwise cannot even attain the shot-noise limit.
DOI
10.1364/fio.2015.fth2c.6

Related papers

Quantum position measurement of a shadow: beating the classical limit

Ermes Toninelli, M. Edgar, Paul‐Antoine Moreau +3 more

The precision with which the position of a shadow can be measured is classically limited by shot-noise. We achieve sub-shot-noise position sensitivity by jointly detecting correlated photons with a simple split-detector scheme.

Frontiers in Optics•Jan 1, 2017•0 citations

Multi-Photon Entanglement for Sub Shot-Noise Sensitivity

Christian Schwemmer, Roland Krischek, Witlef Wieczorek +5 more

We experimentally demonstrate a general criterion to identify multi-photon entangled states useful for quantum metrology and prove their applicability for phase estimation with a sensitivity higher than the shot-noise limit.

Research in Optical Sciences•Jan 1, 2012•0 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

Experimental super-resolved phase measurements with shot-noise sensitivity

Lior Cohen, D. Istrati, Liat Dovrat +1 more

The ultimate sensitivity of optical measurements is a key element of many recent works. Classically, it is mainly limited by the shot noise limit. However, a measurement setup that incorporates quantum mechanical principles can surpass the shot noise limit and reach the Heisenberg limit. Nevertheless, many of those experiments fail to break even the classical shot-noise limit. Following a recent proposal, we present here the results of optical phase measurements with a photon-number resolving detector using coherent states of up to 4200 photons on average. An additional scheme that can be implemented using standard single-photon detectors is also presented, and the results of the two schemes are compared. These measurements present deterministic single-shot sub-wavelength super-resolution up to 288 better than the optical wavelength. The results follow the classically limited sensitivity, up to 86 times better than the wavelength.

arXiv:1311.2721•Nov 12, 2013•1 citation

Sub-shot-noise interferometric measurements with two-photon states

A. Kuzmich, L. Mandeļ

We show by coincidence measurements of photon pairs, produced by parametric downconversion and type II phase matching, that a polarization rotation can be determined with an angle uncertainty below the standard quantum limit.

Quantum and Semiclassical Optics Journal of the European Optical Society Part B•Jun 1, 1998•68 citations

A Universal Detection Scheme for Sub-Shot-Noise Interferometry

Yang Gao, Hwang Lee

We show that the parity measurement can be used as a universal detection scheme for the sub-shot-noise limit interferometry. The efforts to produce the desired input states can then be much reduced accordingly.

Frontiers in Optics•Jan 1, 2008•0 citations
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.
The ultimate sensitivity of optical measurements is a key element of many recent works. Classically, it is mainly limited by the shot noise limit. However, a measurement setup that incorporates quantum mechanical principles can surpass the shot noise limit and reach the Heisenberg limit. Nevertheless, many of those experiments fail to break even the classical shot-noise limit. Following a recent proposal, we present here the results of optical phase measurements with a photon-number resolving detector using coherent states of up to 4200 photons on average. An additional scheme that can be implemented using standard single-photon detectors is also presented, and the results of the two schemes are compared. These measurements present deterministic single-shot sub-wavelength super-resolution up to 288 better than the optical wavelength. The results follow the classically limited sensitivity, up to 86 times better than the wavelength.