Communications of the ACM
Quantum Computing Breakthrough: Israeli Scientists Invent Cannon For Entangled Photon Clusters
A device developed by scientists at the Technion-Israel Institute of Technology can produce large clusters of entangled photos.
Credit: Tony Melov/UNSW
Scientists from the Technion-Israel Institute of Technology have created a device that can produce large clusters of entangled photons on demand and repeatedly generate the same result indefinitely.
Terry Rudolph, a professor at the U.K.'s Imperial College London, and Technion professor Netanel Lindner in 2009 first suggested the conceptual idea for creating a kind of cannon or machine gun to ensure on-demand production of entangled photons.
In 2014, researchers from Germany's University of Stuttgart, using a "quantum dot," showed it was possible to obtain entangled pairs on demand. The Technion team built on this work to show that it is possible to create an entire cluster of entangled photons on demand using the quantum dot, while guaranteeing each cluster will always contain a predicted number of entangled photon pairs.
"This has never been demonstrated before, being able to achieve an infinite amount of entangled photons," says Technion professor David Gershoni.
He notes using particles of light is a better way to build a quantum computer than using ions and atoms or superconducting circuits that act as quantum bits.
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