Time-resolved sensing of electromagnetic fields with single-electron interferometry

• URL: http://arxiv.org/abs/2408.12903v1
• Date: Fri, 23 Aug 2024 08:10:34 GMT
• Title: Time-resolved sensing of electromagnetic fields with single-electron interferometry
• Authors: Hugo Bartolomei, Elric Frigerio, Mélanie Ruelle, Giacomo Rebora, Yong Jin, Ulf Gennser, Antonella Cavanna, Emmanuel Baudin, Jean-Marc Berroir, Ines Safi, Pascal Degiovanni, Gerbold C. Ménard, Gwendal Fève,
• Abstract summary: We demonstrate a quantum sensor that exploits the phase of a single electron wavefunction, measured in an electronic Fabry-Perot interferometer. This capability paves the way for on-chip detection of quantum radiation, such as squeezed or Fock states.
• Score: 1.142584243576642
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Characterizing quantum states of the electromagnetic field at microwave frequencies requires fast and sensitive detectors that can simultaneously probe the field time-dependent amplitude and its quantum fluctuations. In this work, we demonstrate a quantum sensor that exploits the phase of a single electron wavefunction, measured in an electronic Fabry-Perot interferometer, to detect a classical time-dependent electric field. The time resolution, limited by the temporal width of the electronic wavepacket, is a few tens of picoseconds. The interferometry technique provides a voltage resolution of a few tens of microvolts, corresponding to a few microwave photons. Importantly, our detector simultaneously probes the amplitude of the field from the phase of the measured interference pattern and its fluctuations from the interference contrast. This capability paves the way for on-chip detection of quantum radiation, such as squeezed or Fock states.

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