Precise Spectroscopy of High-Frequency Oscillating Fields with a Single-Qubit Sensor

TL;DR

This paper introduces a practical method for high-precision frequency measurement of fast oscillating fields using a single-qubit sensor, leveraging phase correlations and dynamical decoupling to enhance accuracy and noise resilience.

Contribution

It presents a novel, experimentally feasible quantum spectroscopy scheme that combines phase correlation analysis with dynamical decoupling for improved frequency precision.

Findings

Achieves high-precision frequency estimation of fast oscillating fields.

Integrates dynamical decoupling to suppress environmental noise.

Applicable to various atomic and solid-state spin systems.

Abstract

Precise spectroscopy of oscillating fields plays significant roles in many fields. Here, we propose an experimentally feasible scheme to measure the frequency of a fast-oscillating field using a single-qubit sensor. By invoking a stable classical clock, the signal phase correlations between successive measurements enable us to extract the target frequency with extremely high precision. In addition, we integrate dynamical decoupling technique into the framework to suppress the influence of slow environmental noise. Our framework is feasible with a variety of atomic and single solid-state-spin systems within the state-of-the-art experimental capabilities as a versatile tool for quantum spectroscopy.