Środowiskowe Seminarium z Informacji i Technologii Kwantowych

Quantum spectroscopy with single two-level systems has considerably improved our ability to detect weak signals. Recently it was realized that for classical signals, precision and resolution of quantum spectroscopy is limited mainly by coherence of the signal and the stability of the clock used to measure time. The coherence time of the quantum probe, which can be significantly shorter, is not a major limiting factor in resolution measurements. In this talk I will address a similar question for spectroscopy of quantum signals, for example, a quantum sensor that is used to detect a single nuclear spin. I will present an analysis of a novel correlation spectroscopy technique with performance that is limited by the coherence time of the target spins and the stability of the clock.