Quantum Computers' All-To-All Connectivity

This is a news story, published by Phys Org, that relates primarily to MIT news.

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quantum interconnects

Phys Org

•

Science

Photon-shuttling interconnection device enables direct communication among multiple quantum processors

Summary

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90% Informative

MIT researchers have developed a new interconnection device that can support scalable, "all-to-all" communication.

The device includes a superconducting wire (waveguide) that shuttles photons between processors and can be routed as far as needed.

They used this interconnect to demonstrate remote entanglement, a type of correlation between quantum processors that are not physically connected.

Researchers used a reinforcement learning algorithm to learn how the propagating photon would be distorted in advance.

They "predistorted" the photon so it was shaped in the best way possible to maximize emission and absorption.

When they implemented this optimized absorption protocol, they were able to show photon absorption efficiency of greater than 60% . This absorption efficiency is high enough to prove that the resulting state at the end of the protocol is entangled.

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