Quantum Zeno and Anti-Zeno probes of noise correlations in photon polarisation

Abstract

We experimentally demonstrate, for the first time, noise diagnostics by repeated quantum measurements. Specifically, we establish the ability of a single photon, subjected to random polarisation noise, to diagnose non-Markovian temporal correlations of such a noise process. In the frequency domain, these noise correlations correspond to colored noise spectra, as opposed to the ones related to Markovian, white noise. Both the noise spectrum and its corresponding temporal correlations are diagnosed by probing the photon by means of frequent, (partially-)selective polarisation measurements. Our main result is the experimental demonstration that noise with positive temporal correlations corresponds to our single photon undergoing a dynamical regime enabled by the quantum Zeno effect (QZE), while noise characterized by negative (anti-) correlations corresponds to regimes associated with the anti-Zeno effect (AZE). This demonstration opens the way to a new kind of noise spectroscopy based on QZE and AZE in photon (or other single-particle) state probing.

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• Deep learning enhanced noise spectroscopy of a spin qubit environment
• Quantum Uncertainty Principles for Measurements with Interventions
• Space-time dual quantum Zeno effect: Interferometric engineering of open quantum system dynamics
• Machine learning classification of non-Markovian noise disturbing quantum dynamics
• Tight-binding model subject to conditional resets at random times
• Protective Measurement -- a new quantum measurement paradigm: detailed description of the first realisation
• Experimental Test of Nonlocality Limits from Relativistic Independence
• Qubit control using quantum Zeno effect: Action principle approach
• Maximizing information obtainable by quantum sensors through the Quantum Zeno Effect
• Performance advantage of protective quantum measurements
• Quantum control for the Zeno effect with noise
• Protective measurements of photon polarization using a temporal pointer
• Learning the noise fingerprint of quantum devices
• Sensing microscopic noise events by frequent quantum measurements