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Quantum entanglement achieved by heat

Aalto University
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Professor Pertli Hakonen and his team from Aalto University have shown new methods of producing quantum entanglement using the thermoelectric effect. Quantum entanglement is used to integrate individual quantum systems into one.

The researchers designed a device where graphene and metal electrodes were used to layer a superconductor. The entangled pair that displayed the property of superconductivity is called the cooper pair.

False-colour electron microscope image of the sample, the green layers are graphene on top of the grey superconductor. The blue metal electrodes are used to extract the entangled electrons. Credit: Aalto University

The temperature difference is used to split them so that each electron can move to a normal metal electrode. The cooper pair splitting works as a mechanism for tuning temperature difference onto corresponding electrical signals in superconducting structures thereby moving one step forward towards quantum computing.

Source / Journal DOI: 10.1038/s41467-020-20476-7

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