Quantum metrology based on strongly correlated matter

US10712406B2 · kind B2 · utility

Assignees

• President and Fellows of Harvard College · US
• The Regents of the University of California · US

Inventors

• Mikhail D. Lukin · Cambridge, US
• Soonwon Choi · Corona, US
• Norman Y. Yao · Berkeley, US

Key dates

• Filing date: Dec 28, 2018
• Grant date: Jul 14, 2020
• Expiry date: Dec 28, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/445
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for quantum metrology using stable non-equilibrium states of quantum matter, such as many-body quantum spin systems, is disclosed. The approach can utilize quantum correlations in such many-body quantum spin systems stabilized by strong interactions and periodic driving for reduction of noise. As an example, an exemplary protocol to perform Floquet enhanced measurements of an oscillating magnetic field in Ising-interacting spin systems is provided. These approaches allow for circumvention of the interaction-induced decoherence associated with high density spin ensembles and is robust to the presence of noise and imperfections. The protocol is applicable to nanoscale magnetic sensing and other precision measurements.