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Related Experiment Video

Updated: May 7, 2026

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

Published on: April 4, 2017

Noisy metrology beyond the standard quantum limit.

R Chaves¹, J B Brask, M Markiewicz

¹ICFO-Institut de Ciències Fotòniques, Mediterranean Technology Park, 08860 Castelldefels, Barcelona, Spain and Institute for Physics, University of Freiburg, Rheinstrasse 10, D-79104 Freiburg, Germany.

Physical Review Letters

|October 8, 2013

Summary

Quantum probes achieve superclassical precision in parameter estimation, even with noise. By orienting the noise and the system

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The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

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Last Updated: May 7, 2026

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

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Published on: April 4, 2017

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

Area of Science:

Quantum metrology
Quantum sensing
Atomic spectroscopy

Background:

Entangled probes offer precision gains over classical methods in noise-free scenarios.
Realistic noise typically limits quantum strategies to constant-factor improvements.

Purpose of the Study:

To identify conditions where quantum strategies can achieve superclassical precision scaling despite noise.
To explore the impact of noise direction on precision enhancement.

Main Methods:

Investigating parameter estimation using entangled probes under specific noise conditions.
Engineering the Hamiltonian evolution to be orthogonal to the noise direction.

Main Results:

Demonstrated superclassical precision scaling is achievable with spatially directed noise.
Identified a specific quantum state that optimizes precision in the presence of perpendicular noise and Hamiltonian evolution.

Conclusions:

Quantum advantage in precision estimation can be preserved and enhanced under specific noise configurations.
Strategic manipulation of noise and system evolution offers a pathway to overcome limitations in quantum metrology.