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Canada is headed for the quantum space race with a project from the University of Waterloo.

Waterloo’s Quantum Encryption and Science Satellite (QEYSSat) initiative, announced as part of the federal government’s recent investment into space-related emerging technologies, joins a global race to quantum cybersecurity via satellites.

The Canadian Association of Physicists (CAP) and the Centre de recherches mathématiques (CRM) have awarded Raymond Laflamme, Executive Director of the Institute for Quantum Computing (IQC) at the University of Waterloo, the 2017 CAP-CRM Prize in Theoretical and Mathematical Physics. The CAP-CRM prize recognizes research excellence in Canada.

In a paper published in Physical Review Letters, PhD student Sascha Agne and colleagues experimentally realized a three-photon Greenberger-Horne-Zeilinger (GHZ) interferometer and observed genuine three-photon interference for the first time, bringing scientists one step closer to exciting applications in quantum communication.

Waterloo, Ont. (Wednesday, December 21, 2016) — Researchers from the Institute for Quantum Computing at the University of Waterloo in Canada are the first to transmit a quantum key securely from a source on the ground to a receiver on an aircraft. The uplink is a prototype for secure quantum communication and shows the viability of the team’s quantum communication satellite mission (QEYSSat) proposal.

Tuesday, October 4, 2016

Solving Tsirelson’s problem

Alice and Bob are on a game show. They each sit in isolation booths at either ends of the set and can’t communicate in any way. The game show host asks a number of questions. Neither knows what questions are being asked, or the answers the other gives. The judges are shocked that they provide the exact same answer more often than they should. From the judges’ perspectives, Alice and Bob appear to read each others’ minds.