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Robust Noise Suppression and Quantum Sensing by Continuous Phased Dynamical Decoupling.

Daniel Louzon1,2, Genko T Genov1, Nicolas Staudenmaier1

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|April 11, 2025
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We introduce continuous phased dynamical decoupling (CPDD) for robust quantum sensing. This method precisely compensates for noise without short pulses, enhancing precision in experiments like nanoscale nuclear magnetic resonance.

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Area of Science:

  • Quantum Information Science
  • Quantum Sensing
  • Spectroscopy

Background:

  • Environmental and amplitude noise limit precision in quantum sensing.
  • Standard dynamical decoupling often relies on short pulses, which can be challenging with limited driving power or at high magnetic fields.

Purpose of the Study:

  • To propose and experimentally demonstrate a novel quantum sensing technique: continuous phased dynamical decoupling (CPDD).
  • To achieve robust compensation of environmental and amplitude noise using CPDD.
  • To enhance precision in quantum sensing applications, particularly those with constraints on driving power or high magnetic fields.

Main Methods:

  • Application of a continuous driving field with discrete phase changes.
  • Implementation of precise timing control for phase changes, surpassing Rabi frequency control.
  • Integration of CPDD with quantum heterodyne detection for nanoscale nuclear magnetic resonance.

Main Results:

  • Successful demonstration of CPDD for quantum sensing and noise compensation.
  • Achieved microhertz uncertainty in estimated signal frequency for a 120-second nanoscale nuclear magnetic resonance measurement.
  • Showcased the suitability of CPDD for experiments with limited driving power or at high magnetic fields.

Conclusions:

  • CPDD offers a powerful new approach for dynamical decoupling, significantly expanding its applicability.
  • The method provides enhanced precision and robustness for quantum sensing.
  • Opens new avenues for experiments in systems like nitrogen-vacancy centers, trapped ions, and trapped atoms.