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arXiv · 1912.10696

Phonon spectral density in a GaAs/AlGaAs double quantum dot

Andrea Hofmann·Christian Karlewski·Andreas Heimes·Christian Reichl·Werner Wegscheider·Gerd Schön·Klaus Ensslin·Thomas Ihn·Ville F. Maisi
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Abstract

We study phonon emission in a GaAs/AlGaAs double quantum dot by monitoring the tunneling of a single electron between the two dots. We prepare the system such that a known amount of energy is emitted in the transition process. The energy is converted into lattice vibrations and the resulting tunneling rate depends strongly on the phonon scattering and its effective phonon spectral density. We are able to fit the measured transition rates and see imprints of interference of phonons with themselves causing oscillations in the transition rates.

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Andrea Hofmann, Christian Karlewski, Andreas Heimes, Christian Reichl, Werner Wegscheider, Gerd Schön, Klaus Ensslin, Thomas Ihn, Ville F. Maisi. 2019-12-23. Phonon spectral density in a GaAs/AlGaAs double quantum dot. https://doi.org/10.1103/physrevresearch.2.033230

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