Wide-band Unambiguous Quantum Sensing via Geodesic Evolution

TL;DR

This paper introduces a quantum sensing method using geodesic evolution driven by $$ pulses, which suppresses noise and errors, enabling robust, wide-band, unambiguous, and high-resolution detection of signals in quantum systems.

Contribution

The paper presents a novel quantum sensing technique that employs geodesic adiabatic evolution to improve robustness and resolution, surpassing limitations of traditional dynamical decoupling methods.

Findings

Effective suppression of decoherence and control errors.

Successful application in both low- and high-frequency sensing.

Enhanced detection accuracy and quantum system control.

Abstract

We present a quantum sensing technique that utilizes a sequence of $\pi$ pulses to cyclically drive the qubit dynamics along a geodesic path of adiabatic evolution. This approach effectively suppresses the effects of both decoherence noise and control errors while simultaneously removing unwanted resonance terms, such as higher harmonics and spurious responses commonly encountered in dynamical decoupling control. As a result, our technique offers robust, wide-band, unambiguous, and high-resolution quantum sensing capabilities for signal detection and individual addressing of quantum systems, including spins. To demonstrate its versatility, we showcase successful applications of our method in both low-frequency and high-frequency sensing scenarios. The significance of this quantum sensing technique extends to the detection of complex signals and the control of intricate quantum environments. By enhancing detection accuracy and enabling precise manipulation of quantum systems, our method holds considerable promise for a variety of practical applications.