Sensing microscopic noise events by frequent quantum measurements

• URL: http://arxiv.org/abs/2212.12530v1
• Date: Fri, 23 Dec 2022 18:45:33 GMT
• Title: Sensing microscopic noise events by frequent quantum measurements
• Authors: Salvatore Virz\`i, Laura T. Knoll, Alessio Avella, Fabrizio Piacentini, Stefano Gherardini, Marco Gramegna, Gershon Kurizki, Abraham G. Kofman, Ivo Pietro Degiovanni, Marco Genovese, and Filippo Caruso
• Abstract summary: We propose and experimentally demonstrate a method allowing us to unravel microscopic noise events that affect a continuous quantum variable. This method proves the possibility of employing photons as quantum noise sensors and robust carriers of information.
• Score: 3.4367812334545165
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We propose and experimentally demonstrate a general method allowing us to unravel microscopic noise events that affect a continuous quantum variable. Such unraveling is achieved by frequent measurements of a discrete variable coupled to the continuous one. The experimental realization involves photons traversing a noisy channel. There, their polarization, whose coupling to the photons spatial wavepacket is subjected to stochastic noise, is frequently measured in the quantum Zeno regime. The measurements not only preserve the polarization state, but also enable the recording of the full noise statistics from the spatially-resolved detection of the photons emerging from the channel. This method proves the possibility of employing photons as quantum noise sensors and robust carriers of information.

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