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Laser Loop Couples Quantum Systems Over a Distance

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A loop of laser light connects the oscillations of a nanomechanical membrane (back) and the spin of a cloud of atoms (front).

Researchers have succeeded in creating strong coupling between quantum systems over a distance, using a laser loop to connect the systems,

Credit: Department of Physics/University of Basel

Researchers at the University of Basel in Switzerland and the University of Hanover in Germany created strong coupling between quantum systems using a laser loop, enabling nearly lossless exchange of information and strong interaction between them.

The team used laser light to couple the vibrations of a 100-nanometer-thick membrane to the motion of the spin of atoms over a distance of one meter.

As a result, each vibration of the membrane sets the spin of the atoms in motion, and vice versa.

This new method could also be used when coupling superconducting quantum bits or solid-state spin systems used in quantum computing research.

Said University of Basel researcher Philipp Treutlein, "We can control the laser beam between the systems, which allows us to generate different types of interactions that are useful for quantum sensors, for example."

From University of Basel
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Abstracts Copyright © 2020 SmithBucklin, Washington, DC, USA


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