Iterative Adaptive Spectroscopy of Short Signals

Avishek Chowdhury, Anh Tuan Le, Eva M. Weig, Hugo Ribeiro

Research output: Contribution to journalArticlepeer-review


We develop an iterative, adaptive frequency sensing protocol based on Ramsey interferometry of a two-level system. Our scheme allows one to estimate unknown frequencies with a high precision from short, finite signals consisting of only a small number of Ramsey fringes. It avoids several issues related to processing of decaying signals and reduces the experimental overhead related to sampling. High precision is achieved by enhancing the Ramsey sequence to prepare with high fidelity both the sensing and readout state and by using an iterative procedure built to mitigate systematic errors when estimating frequencies from Fourier transforms. A comparison with state-of-the-art dynamical decoupling techniques reveals a significant speedup of the frequency estimation without loss of precision.

Original languageEnglish
Article number050802
JournalPhysical Review Letters
Issue number5
StatePublished - 4 Aug 2023


Dive into the research topics of 'Iterative Adaptive Spectroscopy of Short Signals'. Together they form a unique fingerprint.

Cite this