Novel quantum device design promises a regular flow of entangled electrons on demand

0

Researchers were able to time the extraction and splitting of entangled Cooper pairs from a superconductor. Credit: Aalto University

Quantum computer and many other quantum technologies rely on the generation of quantum-entangled pairs of electrons. However, the systems developed so far typically produce a noisy and random flow of entangled electrons, which hinders synchronized operations on the entangled particles. Now, researchers from Aalto University in Finland propose a way to produce a regular flow of spin-entangled electrons.

Their solution is based on a dynamically driven Cooper pair splitter. In a Cooper pair splitter, two quantum dots near a superconductor are used to generate and separate a pair of entangled electrons known as a Cooper pair. When the Cooper pair splitter is driven with a static voltage, the result is a random and noisy process.

A theoretical analysis by the Aalto team showed that driving the system dynamically with external gate voltages makes it possible to control the timing of the splitting process. As a result, exactly one pair of entangled electrons can be extracted during each splitting cycle, leading to a completely noiseless and regular flow of spin-entangled electrons.

Such a device, which is feasible with current technology, would pave the way for dynamic quantum information processing with spin-entangled electrons, opening a broad range of possibilities for future quantum technologies.

The research article was published yesterday in Physical Review Letters.


Entangling electrons with heat


More information:
Fredrik Brange et al, Dynamic Cooper Pair Splitter, Physical Review Letters (2021). DOI: 10.1103/PhysRevLett.127.237701

Provided by
Aalto University


Citation:
Novel quantum device design promises a regular flow of entangled electrons on demand (2021, December 2)
retrieved 2 December 2021
from https://phys.org/news/2021-12-quantum-device-regular-entangled-electrons.html

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.

Read original article here

Denial of responsibility! Verve Times is an automatic aggregator of the all world’s media. In each content, the hyperlink to the primary source is specified. All trademarks belong to their rightful owners, all materials to their authors. If you are the owner of the content and do not want us to publish your materials, please contact us by email – [email protected]. The content will be deleted within 24 hours.

Leave a comment
Hello,