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Quantum Information and Measurement (QIM)

Quantum signal processing for electron quantum optics

Benjamin Roussel, Clément Cabart, Pascal Degiovanni

Published Jan 1, 2017• 0 citations
Publisher

Abstract

Electron quantum optics is an emerging field aiming at understanding quantum transport using ideas from quantum optics. We propose a procedure to find the simplest representation of the single electron coherence emitted by a time-periodic electronic source in terms of electronic wavefunctions.
DOI
10.1364/qim.2017.qw5a.1

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Abstract Recent years have shown increasing interest in understanding the role of the wavefunction of a quantum source on the characteristics of its emitted radiation. In this work, we demonstrate that shaping the wavefunction of the source can drastically change the instantaneous emission. We exemplify this concept by examining an electron in cyclotron motion, calculating the angular power distribution of emission by an electron in a Schrodinger cat state. The emitted cyclotron radiation reveals a breakdown of classical–quantum correspondence. The short-time dynamics of the radiation process shows deviations in the power and electron trajectory that disappear at long times, where the predictions of classical electrodynamics are recovered.