Randomisation of Pulse Phases for Unambiguous and Robust Quantum Sensing

Abstract

We develop theoretically and demonstrate experimentally a universal dynamical decoupling method for robust quantum sensing with unambiguous signal identification. Our method uses randomisation of control pulses to suppress simultaneously two types of errors in the measured spectra that would otherwise lead to false signal identification. These are spurious responses due to finite-width $\pi$ pulses, as well as signal distortion caused by $\pi$ pulse imperfections. For the cases of nanoscale nuclear spin sensing and AC magnetometry, we benchmark the performance of the protocol with a single nitrogen vacancy centre in diamond against widely used non-randomised pulse sequences. Our method is general and can be combined with existing multipulse quantum sensing sequences to enhance their performance.

References in corpus (16)

• Universal dynamical decoupling of a single solid-state spin from a spin bath
• Sub-millihertz magnetic spectroscopy with a nanoscale quantum sensor
• Extending Quantum Coherence in Diamond
• Detection and control of individual nuclear spins using a weakly coupled electron spin
• Quantum sensing with arbitrary frequency resolution
• Nanoscale NMR Spectroscopy and Imaging of Multiple Nuclear Species
• Dynamical Decoupling of a single electron spin at room temperature
• Single-spin magnetometry with multi-pulse sensing sequences
• Nuclear spin pair coherence in diamond for atomic scale magnetometry
• Proton magnetic resonance imaging with a nitrogen-vacancy spin sensor
• Arbitrarily Accurate Pulse Sequences for Robust Dynamical Decoupling
• Spurious harmonic response of multipulse quantum sensing sequences
• Stabilizing shallow color centers in diamond created by nitrogen delta-doping using SF${}_6$ plasma treatment
• Fast dynamical decoupling of the Molmer-Sorensen entangling gate
• Pulse-phase control for spectral disambiguation in quantum sensing protocols
• Unambiguous nuclear spin detection using engineered quantum sensing sequence

Cited by in corpus (1)

• Hybrid Microwave Radiation Patterns for High-Fidelity Quantum Gates with Trapped Ions