Proposal for Quantum Sensing Based on Two-Dimensional Dynamical Decoupling: NMR Correlation Spectroscopy of Single Molecules

Abstract

Nuclear magnetic resonance (NMR) has enormous applications. Two-dimensional NMR is an essential technique to characterize correlations between nuclei and, hence, molecule structures. Towards the ultimate goal of single-molecule NMR, dynamical-decoupling- (DD) enhanced diamond quantum sensing enables the detection of single nuclear spins and nanoscale NMR. However, there is still the lack of a standard method in DD-based quantum sensing to characterize correlations between nuclear spins in single molecules. Here we present a scheme of two-dimensional DD-based quantum sensing, as a universal method for correlation spectroscopy of single molecules. We design two-dimensional DD sequences composed of two sets of periodic DD sequences with different periods, which can be independently set to match two different transition frequencies for resonant DD. We find that under the resonant DD condition the sensor coherence patterns, as functions of the two independent pulse numbers of DD subsequences, can fully determine different types of correlations between nuclear spin transitions. This work offers a systematic approach to correlation spectroscopy for single-molecule NMR.

23 pages, 3 figures + 8 page supplement

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• How to Enhance Dephasing Time in Superconducting Qubits
• Detection and control of individual nuclear spins using a weakly coupled electron spin
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Cited by in corpus (7)

• Characterization of arbitrary-order correlations in quantum baths by weak measurement
• Randomisation of Pulse Phases for Unambiguous and Robust Quantum Sensing
• Soft Quantum Control for Highly Selective Interactions among Joint Quantum Systems
• Atomic-scale structure analysis of a molecule at a (6-nanometer)${}^3$ ice crystal
• Improving spin-based noise sensing by adaptive measurements
• Improving quantum parameter estimation by monitoring quantum trajectories
• Monte Carlo approach for finding optimally controlled quantum gates with differential geometry