Quantum noise sensing via quantum Zeno and anti-Zeno effects
Year: 2025
Type: conference-paper
Abstract: Quantum control is a fundamental tool for quantum technologies, and quantum Zeno (QZE) and anti-Zeno (AZE) effects, respectively denoting the slowdown and speedup of quantum system evolution by frequent interruptions/operations, represent quantum control paradigms. Indeed, they allow either protecting (QZE) or steering (AZE) the state of a quantum system via the interplay between frequent operations (system control) and the coupling of the system to its environment. Here we present two experiments demonstrating the possibility to exploit QZE and AZE to extract information on noise processes occurring in a quantum channel. In the first experiment, we realize the first noise diagnostics scheme based on repeated quantum measurements, showing how a single photon undergoing a noise process (in our case, random polarization fluctuations) can quantify non-Markovian temporal correlations within such a noise. In the second experiment, we show how a QZE-protection mechanism applied to a quantum state can become a noise sensing technique, allowing to estimate the statistical distribution of decoherence effects occurring on a photonic qubit during its propagation in a noisy quantum channel.
DOI: 10.1117/12.3053453
Institutions: Istituto Nazionale di Ricerca Metrologica, Consejo Nacional de Investigaciones Científicas y Técnicas, Institute of Scientific and Technical Research for Defense, European Laboratory for Non-Linear Spectroscopy, National Institute of Optics, National Research Council, Palacký University Olomouc, Shanghai University, Weizmann Institute of Science, University of Florence, Istituto Nazionale di Fisica Nucleare
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4408599998