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Quantum State of Single Electrons Controlled by 'Surfing' on Sound Waves


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Part of a three-dimensional rendering of the semiconductor's nanostructure.

An international team of researchers used sound waves to control quantum information in a single electron, a step toward efficient quantum computers built from semiconductors.

Credit: Hermann Edlbauer

An international team including researchers at the U.K.'s University of Cambridge used sound waves to control quantum information in one electron, a step toward efficient quantum computers built from semiconductors.

The team used an electron's spin to store quantum information.

Cambridge's Hugo Lepage said, "Harnessing spin ... is a more scalable approach than using superconductivity, and we believe that using spin could lead to a quantum computer which is far more robust, since spin interactions are set by the laws of nature."

The researchers overlaid a semiconductor with metallic gates and applied a voltage to produce an electric field; directing high-frequency sound waves over the device induced vibration and distortion, trapping electrons.

The team said it was able to control a single electron's behavior with 99.5% efficiency.

From University of Cambridge
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Abstracts Copyright © 2019 SmithBucklin, Washington, DC, USA


 

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