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Updated: Jul 18, 2025
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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
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Fisher Information as General Metrics of Quantum Synchronization
Yuan Shen1, Hong Yi Soh2, Leong-Chuan Kwek1,2,3,4
1School of Electrical and Electronic Engineering, Nanyang Technological University, Block S2.1, 50 Nanyang Avenue, Singapore 639798, Singapore.
Entropy (Basel, Switzerland)
|August 26, 2023
Summary
This study introduces classical and quantum Fisher information (FI) as novel metrics for quantum synchronization. These FI-based measures offer a more general and robust way to detect synchronization, especially in noisy quantum systems.
Area of Science:
- Quantum nonlinear dynamics
- Quantum information processing
- Quantum phase synchronization
Background:
- Quantum synchronization is vital for quantum technologies but lacks a universally adopted quantification metric.
- Existing measures for quantum synchronization have limitations in certain regimes and are sensitive to noise.
Purpose of the Study:
- To propose and validate classical and quantum Fisher Information (FI) as robust metrics for detecting and quantifying quantum synchronization.
- To establish a connection between Fisher Information and quantum synchronization phenomena.
- To investigate the performance of FI-based measures in noisy quantum environments.
Main Methods:
- Utilizing classical and quantum Fisher Information (FI) to detect and measure quantum synchronization.
- Establishing theoretical connections between FI and quantum synchronization dynamics.
- Analyzing the impact of noise, dissipation, and decoherence on synchronization measures.
Main Results:
- Demonstrated that classical and quantum FI can serve as general indicators of quantum phase synchronization, even when other measures fail.
- Highlighted the advantages of FI-based measures, particularly for 2-to-1 synchronization scenarios.
- Revealed the robustness and susceptibility of different synchronization measures under various noise conditions.
Conclusions:
- Classical and quantum Fisher Information provide a promising and more general approach to quantifying quantum synchronization.
- FI-based metrics offer enhanced reliability in detecting synchronization, especially in complex or noisy quantum systems.
- This work opens new pathways for understanding and utilizing quantum synchronization in quantum information processing.
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