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Distributed Quantum Sensing With Measurement-after-interaction Strategies.

Home
Distributed Quantum Sensing With Measurement-after-interaction Strategies.

Related Experiment Video

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

Distributed quantum sensing with measurement-after-interaction strategies.

Jiajie Guo¹, Shuheng Liu¹, Matteo Fadel²

¹State Key Laboratory of Artificial Microstructure and Mesoscopic Physics, School of Physics, Frontiers Science Center for Nano-optoelectronics, Collaborative Innovation Center of Quantum Matter, Peking University, Beijing, China.

NPJ Quantum Information

|June 1, 2026

View abstract on PubMed

Summary

This summary is machine-generated.

Measurement-after-interaction (MAI) strategies enhance multiparameter quantum estimation. These advanced quantum sensing protocols improve sensitivity and noise robustness, reaching Heisenberg scaling for spin-squeezed states.

Keywords:

Optics and photonics Physics

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Published on: September 8, 2023

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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

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Published on: April 4, 2017

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Area of Science:

Quantum Information Science
Quantum Metrology
Quantum Sensing

Background:

Multiparameter quantum estimation is crucial for precision measurements.
Standard linear measurements face limitations, especially with non-Gaussian states.
Measurement-after-interaction (MAI) strategies offer a potential improvement.

Purpose of the Study:

To investigate MAI strategies for multiparameter quantum estimation.
To analyze the impact of local vs. nonlocal additional evolution in MAI.
To benchmark MAI performance in discrete- and continuous-variable systems.

Main Methods:

Benchmarking MAI strategies in discrete- and continuous-variable quantum systems.
Analyzing probe state evolution before linear measurements.

Deriving analytical results for multiparameter squeezing and scaling laws.

Main Results:

MAI strategies significantly enhance multiparameter sensitivity and robustness against noise.
Nonlocal evolution in MAI provides distinct advantages.
MAI protocols achieve Heisenberg scaling for spin-squeezed states, especially with non-Gaussian states.
Standard linear measurements are insufficient for certain non-Gaussian states.

Conclusions:

MAI strategies offer a powerful approach to overcome limitations in multiparameter quantum estimation.
These protocols demonstrate superior performance, particularly in noisy environments and with complex quantum states.
The findings are applicable to current experimental platforms like atomic ensembles and optical fields.