A Machine-Designed Sensor to Make Optimal Use of Entanglement-Generating Dynamics for Quantum Sensing

Abstract

We use machine optimisation to develop a quantum sensing scheme that achieves significantly better sensitivity than traditional schemes with the same quantum resources. Utilising one-axis twisting dynamics to generate quantum entanglement, we find that rather than dividing the temporal resources into seperate "state-preparation" and "interrogation" stages, a complicated machine-designed sequence of rotations allows for the generation of metrologically useful entanglement while the parameter is interrogated. This provides much higher sensitivities for a given total time compared to states generated via traditional one-axis twisting schemes. This approach could be applied to other methods of generating quantum-enhanced states, allowing for atomic clocks, magnetometers, and inertial sensors with increased sensitivities.

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• Optimal Control for Quantum Metrology via Pontryagin's principle
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• Application of Pontryagin's Maximum Principle to Quantum Metrology in Dissipative Systems
• Non-Markovian temperature sensing
• Efficient Generation of Spin Cat States
• Quantum metrology via chaos in a driven Bose-Josephson system
• Criticality-enhanced quantum sensor at finite temperature
• Threshold for a discrete-variable sensor of quantum reservoirs
• Heisenberg-limited spin squeezing in coupled spin systems
• Continuous field tracking with machine learning and steady state spin squeezing
• Frequentist Parameter Estimation with Supervised Learning
• Continuous-variable quantum sensing of a dissipative reservoir
• Stochastic optimal control formalism for an open quantum system
• Twist-and-turn dynamics of spin squeezing in bosonic Josephson junctions: Enhanced shortcuts-to-adiabaticity approach
• Cyclic nonlinear interferometry with entangled non-Gaussian spin states
• Reinforcement Learning for Rotation Sensing with Ultracold Atoms in an Optical Lattice
• Enhancing Dynamic Range of Sub-Quantum-Limit Measurements via Quantum Deamplification
• Preparing spin-squeezed states in Rydberg atom arrays via quantum optimal control
• Application of Optimal Control to Time-Resolution Protocol for Quantum Sensing
• Evolution of quantum geometric tensor of 1D periodic systems after a quench