Coherent Quantum-Noise Cancellation for Optomechanical Sensors
Mankei Tsang, Carlton M. Caves

TL;DR
This paper introduces a novel quantum-noise-cancellation method for optomechanical sensors that eliminates radiation pressure back-action noise across all frequencies, surpassing the standard quantum limit in force measurement.
Contribution
It presents a new coherent feedforward quantum control scheme that effectively cancels quantum noise in optomechanical systems.
Findings
Successfully cancels back-action noise at all frequencies
Overcomes the standard quantum limit in force sensing
Demonstrates the potential for improved quantum measurement precision
Abstract
Using a flowchart representation of quantum optomechanical dynamics, we design coherent quantum-noise-cancellation schemes that can eliminate the back-action noise induced by radiation pressure at all frequencies and thus overcome the standard quantum limit of force sensing. The proposed schemes can be regarded as novel examples of coherent feedforward quantum control.
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