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Spontaneous emission of phonons by coupled quantum dots

Tobias Brandes·Bernhard Kramer
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Abstract

We find an interference effect for electron-phonon interactions in coupled semiconductor quantum dots that can dominate the nonlinear transport properties even for temperatures close to zero. The intradot electron tunnel process leads to a `shake up' of the phonon system and is dominated by a double-slit-like interference effect of spontaneously emitted phonons. The effect is closely related to subradiance of photons (Dicke effect) in a laser-trapped two-ion system and explains the oscillations in the nonlinear current-voltage characteristics of coupled dots observed recently.

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Tobias Brandes, Bernhard Kramer. 1999-08-27. Spontaneous emission of phonons by coupled quantum dots. https://doi.org/10.1103/physrevlett.83.3021

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