Edward Conard

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  • “…a must-read for serious students of economic policy.” - Glenn Hubbard, Dean, Columbia Business School, and former Chairman of the Council of Economic Advisers
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AI Summary. Researchers transmitted coherent quantum information 158 miles over existing buried fiber-optic telecommunications cables using ordinary computers, without the cryogenic cooling such systems typically require. A relay detector at a midpoint data center between two German cities enabled the distance, which had previously been achieved only in laboratory settings.

Aylin Woodward Wall Street Journal
Date Posted:

A team at Toshiba Europe sent quantum information over a record-breaking 158 miles, achieving quantum communication – an ultra secure means of transmitting data – using ordinary computers and fiber-optic cables.

Can quantum information travel long distances over existing fiber-optic networks?

Core argument: Toshiba Europe researchers sent quantum information across a record 158 miles using ordinary computers and existing fiber-optic cables, the first coherent quantum communication achieved over existing telecommunications infrastructure without cryogenic cooling, according to a study published in Nature.

Scientists have sent quantum information across a record-breaking 158 miles using ordinary computers and fiber-optic cables. It is the first time coherent quantum communication—an ultrasecure means of transmitting data—has been achieved using existing telecommunications infrastructure, without the expensive cryogenic cooling that is typically required. “Our equipment was running alongside the fibers that we use for regular communication literally buried underneath the roads and train stations,” said Mirko Pittaluga, a physicist and lead author of a study published Wednesday in Nature describing the work. Pittaluga and his colleagues at Toshiba Europe sent quantum information from regular computers hooked into the telecommunications network at data centers in the German cities of Kehl and Frankfurt, relaying them through a detector at a third data center roughly midway between them in Kirchfeld. The three-location setup enabled the group to extend the distance the messages were sent more than 150 miles, an uninterrupted distance only ever achieved in a laboratory environment.

Takeaways by Macro Roundup® AI

  1. Toshiba Europe researchers sent quantum information across a record 158 miles using ordinary computers and existing fiber-optic cables, the first coherent quantum communication achieved over existing telecommunications infrastructure without cryogenic cooling, according to a study published in Nature.
  2. The team relayed quantum messages between data centers in the German cities of Kehl and Frankfurt through a detector at a third data center in Kirchfeld roughly midway, a three-location setup that extended the distance beyond 150 miles.
  3. Lead author Mirko Pittaluga said the equipment ran alongside fibers used for regular communication buried under roads and train stations, a distance previously achieved uninterrupted only in a laboratory environment.

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  • Physicists Question Microsoft’s Quantum Claim — Physicists outside the work have responded cautiously to Microsoft's topological quantum computing claim, noting that the search for topological qubits and the "Majorana" particles underpinning them has a history of bold announcements later withdrawn. Researchers describe the technology as excruciatingly difficult to actually build.
  • Microsoft’s Majorana 1 Chip Carves New Path for Quantum Computing — Microsoft unveiled Majorana 1, a quantum chip built on a Topological Core architecture using a new materials stack of indium arsenide and aluminum, which the company expects will enable quantum computers capable of solving industrial-scale problems within years rather than decades. The topological superconductor produces a qubit that is fast, small, stable, and digitally controlled.
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