Authors: Minwei Shi, Guzhi Bao, Jinxian Guo, Weiping Zhang

Published on: May 16, 2024

Impact Score: 7.6

Arxiv code: Arxiv:2405.09899

Summary

• What is new: Introduction of higher-order exceptional points (HOEPs) using Hermitian magnon-photon interaction in atom-cavity systems to enhance quantum metrology without external Langevin noises.
• Why this is important: The measurement enhancement provided by exceptional points in non-Hermitian systems is diminished by intrinsic Langevin noises.
• What the research proposes: Constructing higher-order exceptional points through Hermitian interactions, which mimics non-Hermitian dynamics but avoids the detrimental Langevin noises.
• Results: Demonstration of a superior sensitivity in an EP3/4-based atomic sensor, significantly outperforming the EP2-based sensors.

Technical Details

Technological frameworks used: Quantum metrology, non-Hermitian physics

Models used: Hermitian magnon-photon interaction model

Data used: Theoretical and experimental data from atom-cavity systems

Potential Impact

Quantum technology companies, precision measurement instruments, and industries relying on high-sensitivity sensors

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