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Integrable quantum many-body sensors for AC field sensing
Utkarsh Mishra1, Abolfazl Bayat2
1Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610051, China. utkarsh.mishra@uestc.edu.cn.
Scientific Reports
|August 30, 2022
Summary
Quantum sensing utilizes many-body systems for AC field detection, achieving precision beyond classical limits. This method, applicable to near-term quantum simulators, offers a novel approach to quantum metrology.
Area of Science:
- Quantum Technologies
- Quantum Metrology
- Condensed Matter Physics
Background:
- Quantum sensing demonstrates the superiority of quantum technologies over classical methods.
- AC field sensing is a key area within quantum metrology.
- Conventional strategies often rely on ground states of critical many-body systems.
Purpose of the Study:
- To demonstrate the efficient detection of AC field amplitude using integrable many-body systems.
- To explore sensing strategies with partial subsystem access.
- To achieve quantum precision approaching the Heisenberg limit.
Main Methods:
- Analytical and numerical analysis of integrable many-body systems.
- Exploitation of subsystem steady states due to periodic dynamics.
- Investigation of Floquet gap closing as a source of enhanced precision.
Main Results:
- Integrable many-body systems can efficiently detect AC field amplitude.
- Partial subsystem access allows sensing precision beyond the classical limit, approaching the Heisenberg bound.
- Enhanced precision is linked to Floquet gap closing, similar to critical quantum sensing.
Conclusions:
- The proposed protocol is feasible in near-term quantum simulators like ion-traps.
- Simple block magnetization measurements and Bayesian inference can achieve high-precision AC field sensing.
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