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Nonreciprocal quantum sensing via directional squeezing in two coupled microring resonators.
Optics Express
|February 20, 2026
Summary
This study introduces a novel quantum gyroscope using coupled microring resonators for enhanced rotation sensing. The proposed scheme achieves nonreciprocal sensing, significantly improving precision for forward-input measurements.
Area of Science:
- Quantum optics
- Optomechanical sensing
Background:
- Sagnac-Fizeau shifts are crucial for rotation sensing.
- Nonreciprocity in optical systems is key for enhanced measurements.
Purpose of the Study:
- To propose a scheme for nonreciprocal quantum rotation sensing.
- To enhance the precision of quantum gyroscopes.
Main Methods:
- Utilizing two coupled microring resonators, one rotating.
- Inducing opposite Sagnac-Fizeau shifts via resonator driving.
- Generating directional squeezing in a nonlinear resonator.
Main Results:
- Demonstrated nonreciprocal estimation of Sagnac-Fizeau shifts.
- Achieved dramatically enhanced estimation precision for forward-input.
- Showed that second-order coherence measurements improve precision.
Conclusions:
- The proposed scheme offers a new perspective for quantum gyroscope design.
- Nonreciprocal quantum sensing can significantly boost measurement precision.
- Chiral photon interactions are key to the enhanced sensing mechanism.
