Quantum Enhanced Sensing, Measurement, and Control

Shakti Prasanna Khadanga, Kali Charan Rath, Alex Khang +2 more

This book chapter explores the application of quantum sensing and metrology in industrial settings and its potential to revolutionize measurement science. Quantum sensing utilizes the principles of quantum mechanics to significantly improve the accuracy, precision, and sensitivity of measurement devices, offering a new paradigm for industrial measurement and control systems. The chapter provides an overview of key concepts and technologies, such as quantum entanglement, superposition, and quantum coherence, elucidating their role in enhancing measurement capabilities in industrial environments. It examines specific applications of quantum sensing, including quantum-based temperature sensors, quantum gravimeters, and quantum-enhanced spectroscopy, showcasing their advantages over classical measurement techniques. By uncovering the potential of quantum sensing in industrial applications, this chapter paves the way for transformative advancements in measurement science within the industrial sector.

Ian S. Osborne

Javid Naikoo

We show that strongly amplified dynamical responses in cavity optomechanical systems can be harnessed for enhanced quantum sensing. By tuning the optomechanical interaction to a regime of enhanced susceptibility, weak perturbations produce disproportionately large changes in the system response, leading to substantially improved estimation precision. Using Gaussian estimation theory, we demonstrate that the quantum Fisher information exhibits a divergent scaling as the perturbation strength decreases, implying a corresponding suppression of the estimation error. We further show that heterodyne detection of the output cavity field yields the classical Fisher information with the same asymptotic scaling as the quantum Fisher information, demonstrating that the enhanced sensitivity is accessible with a standard measurement protocol. These results identify amplified optomechanical dynamics as a controllable resource for quantum enhanced sensing and metrology.

David S. Simon

Charles Wang, M.M. Santos

Francesco Poggiali, Santiago Hernández-Gómez, Paola Cappellaro +1 more

We devise a robust quantum sensing scheme based on optimal control. We experimentally demonstrate sensitivity enhancement of diamond spin-qubits sensors to measure ultraweak time-varying magnetic fields in noisy environments.