ADVERTISEMENT

ADVERTISEMENT

Science

Researchers Find Missing Photonic Link to Create All-Silicon Quantum Internet

ADVERTISEMENT

Written by admin

ADVERTISEMENT

ADVERTISEMENT

A single T-centered qubit in a silicon lattice (rendering) that supports the first single spin ever observed optically in silicon. The constituents of the T-center (two carbon atoms and a hydrogen atom) are shown in orange, and the spin of an optically addressed electron is shown in pale blue. 1 credit

Researchers at Simon Fraser University have made a decisive breakthrough in the development of quantum technologies.

Their study, published in Nature today describes his observations of more than 150,000 “T-centered” silicon photonic spin qubits, a milestone that opens up immediate possibilities for building scalable quantum computers and the quantum internet that will connect them.

Quantum computing has enormous potential to provide computing power far beyond the capabilities of today’s supercomputers, which could drive progress in many other areas, including chemistry, materials science, medicine, and cybersecurity.

To make this a reality, it is necessary to produce both stable, long-lived qubits that provide processing power, and communication technology that allows these qubits to communicate with each other at scale.

Past research has shown that silicon can produce some of the most stable and long-lived qubits in the industry. Now a study published by Daniel Higginbottom, Alex Kurkdjian and co-authors provides evidence that T-centers, a special luminescent defect in silicon, can provide “photonic coupling” between qubits. This comes from the SFU Silicon Quantum Technology Laboratory in the SFU Department of Physics, co-led by Stephanie Simmons, a Canadian researcher in silicon quantum technology, and Michael Thewalt, Professor Emeritus.

SFU Researchers Find Missing Photon Link to Make All-Silicon Quantum Internet

A set of integrated photonic devices used to perform the first all-optical single-spin measurement in silicon. One luminescent rotation is visualized in the center of each “microwasher”. The spiral arrow points to a photon bond from one of these spin qubits. 1 credit

“This work is the first isolated measurement of single T-centers, and in fact the first measurement of any single spin in silicon, that has been done with optical measurements alone,” says Stephanie Simmons.

“A T-center-like emitter that combines high-performance spin qubits and optical photon generation is ideal for building scalable distributed quantum computers because they can process and exchange data together rather than linking two different quantum technologies. one for processing and one for communications,” Simmons says.

In addition, T-centers have the advantage of emitting light at the same wavelength as modern urban fiber optic communications and telecommunications network equipment.

SFU Researchers Find Missing Photon Link to Make All-Silicon Quantum Internet

Optical microscope image of an array of integrated photonic devices used to perform the first all-optical single-spin measurement in silicon. Tens of thousands of such “microwashers” were made on a single silicon photonic chip. 1 credit

“With T-centers, you can build quantum processors that, by their very nature, interact with other processors,” Simmons says. “When your silicon qubit can communicate by emitting photons (light) in the same range used in data centers and fiber optic networks, you get the same benefits for connecting the millions of qubits required for quantum computing.”

The development of quantum technologies using silicon opens up opportunities for rapidly scaling quantum computing. The global semiconductor industry is already capable of producing silicon computer chips inexpensively on a large scale with a staggering degree of accuracy. This technology forms the basis of modern computing and networking, from smartphones to the world’s most powerful supercomputers.

  • SFU Researchers Find Missing Photon Link to Make All-Silicon Quantum Internet

    Data revealing the first optical observation of spins in silicon. Scanning one spin with two lasers reveals characteristic central peaks split along the spin; here the experimental data is visualized as an extruded mosaic. 1 credit

  • SFU Researchers Find Missing Photon Link to Make All-Silicon Quantum Internet

    Data revealing the first optical observation of spins in silicon. Scanning one spin with two lasers reveals characteristic central peaks split along the spin; here the experimental data is visualized as a tiled heatmap. 1 credit

“By finding a way to create quantum computing processors in silicon, you can take advantage of all the years of development, knowledge and infrastructure used to manufacture conventional computers, instead of creating an entirely new industry for quantum manufacturing,” says Simmons. “This represents an almost insurmountable competitive advantage in the international race for the quantum computer.”


An entangled state with three qubits has been implemented in a fully controlled array of spin qubits in silicon.


Additional Information:
Stephanie Simmons, Optical observation of single spins in silicon, Nature (2022). DOI: 10.1038/s41586-022-04821-y. www.nature.com/articles/s41586-022-04821-y

Contributed by Simon Fraser University

Quote: Researchers Find Missing Photonic Link Enables All-Silicon Quantum Internet (July 13, 2022) Retrieved July 14, 2022 from https://phys.org/news/2022-07-photonic-link-enable-all- silicon-quant.html

This document is protected by copyright. Except in any fair dealing for the purpose of private study or research, no part may be reproduced without written permission. Content is provided for informational purposes only.


#Researchers #Find #Missing #Photonic #Link #Create #AllSilicon #Quantum #Internet

ADVERTISEMENT

ADVERTISEMENT

About the author

admin

Leave a Comment