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Related Experiment Video

Updated: Jun 3, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Coherent electron-phonon coupling in tailored quantum systems.

P Roulleau¹, S Baer, T Choi

¹Solid State Physics Laboratory, ETH Zurich, 8093 Zurich, Switzerland. roulleau@phys.ethz.ch

Nature Communications

|March 17, 2011

Summary

This summary is machine-generated.

Electron-phonon coupling causes decoherence in nanostructures. We observed current oscillations in double quantum dots due to acoustic phonon interference, which diminish with increasing temperature.

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Area of Science:

Quantum physics
Condensed matter physics
Nanotechnology

Background:

Decoherence, arising from system-environment coupling, hinders coherent manipulation of quantum states.
Understanding decoherence sources is vital for quantum technologies utilizing nanostructures.

Purpose of the Study:

Investigate the impact of electron-phonon coupling on decoherence in graphene and InAs nanowire double quantum dots (DQDs).
Identify the mechanisms behind observed current oscillations in DQDs.

Main Methods:

Electrical transport measurements on graphene and InAs nanowire DQDs.
Analysis of DQD current as a function of energy detuning.
Temperature-dependent measurements to probe decoherence effects.

Main Results:

Observed current oscillations periodic in energy detuning in both graphene and InAs nanowire DQDs.
Oscillations were more pronounced in the InAs nanowire compared to graphene.
The oscillations disappeared at elevated temperatures.

Conclusions:

The observed oscillations are attributed to interference between inelastic decay paths involving acoustic phonons.
This electron-phonon coupling mechanism explains the temperature dependence of the oscillations.
The findings provide insights into decoherence in nanostructure-based quantum systems.