Time-resolved detection of single-electron interference

Details Time-resolved detection of single-electron interference Time-resolved detection of single-electron interference

2008-07-11

arxiv.org/abs/0807.1881v1

Nano Lett. 8, 2547 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Supporting Information Available: http://www.nanophys.ethz.ch/gallery/movies/SingleElectronAB/index.htm contains a movie sho

Scientific paper

We demonstrate real-time detection of self-interfering electrons in a double quantum dot embedded in an Aharonov-Bohm interferometer, with visibility approaching unity. We use a quantum point contact as a charge detector to perform time-resolved measurements of single-electron tunneling. With increased bias voltage, the quantum point contact exerts a back-action on the interferometer leading to decoherence. We attribute this to emission of radiation from the quantum point contact, which drives non-coherent electronic transitions in the quantum dots.

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