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Primeur weekly 2015-04-20

Special

Silvana Muscella to look back with satisfaction on a content-rich CloudScape VII event ...

Open standard Intercloud run by industry with global international standard on top of it would be ideal scenario ...

Rüdiger Dorn to present Microsoft's Trusted Cloud Initiative at CloudScape VII ...

The Cloud

ISC Cloud & Big Data keynote will recount bank's path into Cloud computing ...

Say it loud - it's fog and it's Cloud ...

IBM and partners to transform personal health with Watson and Open Cloud ...

Ministry of Health Brazil deploys Oracle Healthcare Master Person Index to improve health data interoperability ...

Desktop Grids

Alantu seeks beta testers ...

DENIS@Home to join BOINC ...

EuroFlash

RSC Group has deployed a massively parallel MVS-10P MP supercomputer based on RSC PetaStream architecture and the highest-performing Intel Xeon Phi 7120D at JSCC RAS ...

CoolIT Systems selected to host Birds-of-a-Feather (BoF) session at ISC 2015 in Frankfurt ...

PRACE Preparatory Access completes 20th cut-off with strong participation of industry ...

We-NMR cluster at Utrecht Bijvoet Center accommodated into Life Science Grid ...

CHAIN-REDS paves way for global e-Infrastructure ecosystem for researchers ...

USFlash

Intel Enterprise Edition for Lustre 2.2 launched ...

Storage boost at the National Computational Infrastructure in Australia ...

CASC announces new Director ...

OLCF selects application readiness projects to prepare for next-generation Summit supercomputer ...

Researchers to Tap NVLink to Power Next-Gen Research on Summit Supercomputer - ...

Computer-designed Rocker protein world's first to biomimic ion transport ...

For Big Data researchers, network and compute capabilities are lynchpin to success ...

Ultra-high-speed broadband bolsters UConn research ...

NIST tightens the bounds on the quantum information 'speed limit' ...

Electrical control of quantum bits in silicon paves the way to large quantum computers ...

Quantum cryptography at the speed of light: Researchers design first all-photonic repeaters ...

Quantum cryptography at the speed of light: Researchers design first all-photonic repeaters

15 Apr 2015 Toronto - Imagine having your MRI results sent directly to your phone, with no concern over the security of your private health data. Or knowing your financial information was safe on a server halfway around the world. Or sending highly sensitive business correspondence, without worrying that it would fall into the wrong hands.

Thanks to new research from engineers at the University of Toronto, these types of perfectly secure information exchanges are one step closer to reality. Published inNature Communications, researchers have designed the first all-photonic quantum repeaters - protocols that ensure data can be carried reliably and securely across longer distances when using quantum cryptography.

Communication that uses quantum cryptography exploits the laws of quantum mechanics to relay information from one user to another, coded in the quantum states of photons. But sending photons long distances over fibres is easier said than done - more than 90 percent of photons are lost over distances greater than 50 kilometres, severely limiting the range of quantum communication.

To extend the range, much research has focused on developing 'quantum repeaters' to give photons a "boost" and reduce loss. These repeaters acted like mini quantum computers, storing the entangled photons and relaying their signals down the fibres - they needed to be kept at cool temperatures and had low repeat rates, making them inconvenient and slow.

These new all-photonic quantum repeaters from engineers at University of Toronto relay photons over long distances using photons only, without the demanding requirements of matter quantum memories or an interface between matter and light at all.

Professor Hoi-Kwong Lo of The Edward S. Rogers Sr. Department of Electrical & Computer Engineering and the Department of Physics at the University of Toronto collaborated with Dr. Koji Azuma and Dr. Kiyoshi Tamaki of the Nippon Telegraph and Telephone Corporation in Japan on the project.

"There's a lot of interest in the community around designing a quantum Internet that will be more information-rich and more powerful, but these quantum states can also be fragile", stated Professor Lo. "Our motivation was to design a means for communicating securely and reliably over long distances."

The team's proposed all-photonic repeaters boast higher quantum-communication rates, use optical elements whose proof-of-principle demonstrations have already been made, and function at room temperature. The proposed all photonic quantum repeaters make essential use of highly entangled quantum states - called 'cluster states' - and their useful property of fault-tolerance to losses.

All-photonic repeaters could be used to network individual quantum computers, which remain unrealized and the domain of intense research around the globe.

"Imagine in the future we have various quantum computers around the world, run by different users", stated Professor Lo. "We would want to convey information between them, but current modes of communication are not safe against attacks or losses."

Quantum computers are on the way, but this technology has implications for another area that sounds like science fiction: quantum teleportation.

"The original question was whether we could transmit polarization over long distances, but that's boring - then researchers asked, can we do something fancier?" stated Professor Lo. "And it turns out we can do quantum teleportation."

You won't be beaming from home to work any time soon, but researchers have already completed experimental demonstrations of beaming states of photons and even atoms from one location to another.

This work was supported by the Natural Science and Engineering Research Council of Canada (NSERC), and Japan's National Institute of Information and Communications Technology (NICT).
Source: University of Toronto

Back to Table of contents

Primeur weekly 2015-04-20

Special

Silvana Muscella to look back with satisfaction on a content-rich CloudScape VII event ...

Open standard Intercloud run by industry with global international standard on top of it would be ideal scenario ...

Rüdiger Dorn to present Microsoft's Trusted Cloud Initiative at CloudScape VII ...

The Cloud

ISC Cloud & Big Data keynote will recount bank's path into Cloud computing ...

Say it loud - it's fog and it's Cloud ...

IBM and partners to transform personal health with Watson and Open Cloud ...

Ministry of Health Brazil deploys Oracle Healthcare Master Person Index to improve health data interoperability ...

Desktop Grids

Alantu seeks beta testers ...

DENIS@Home to join BOINC ...

EuroFlash

RSC Group has deployed a massively parallel MVS-10P MP supercomputer based on RSC PetaStream architecture and the highest-performing Intel Xeon Phi 7120D at JSCC RAS ...

CoolIT Systems selected to host Birds-of-a-Feather (BoF) session at ISC 2015 in Frankfurt ...

PRACE Preparatory Access completes 20th cut-off with strong participation of industry ...

We-NMR cluster at Utrecht Bijvoet Center accommodated into Life Science Grid ...

CHAIN-REDS paves way for global e-Infrastructure ecosystem for researchers ...

USFlash

Intel Enterprise Edition for Lustre 2.2 launched ...

Storage boost at the National Computational Infrastructure in Australia ...

CASC announces new Director ...

OLCF selects application readiness projects to prepare for next-generation Summit supercomputer ...

Researchers to Tap NVLink to Power Next-Gen Research on Summit Supercomputer - ...

Computer-designed Rocker protein world's first to biomimic ion transport ...

For Big Data researchers, network and compute capabilities are lynchpin to success ...

Ultra-high-speed broadband bolsters UConn research ...

NIST tightens the bounds on the quantum information 'speed limit' ...

Electrical control of quantum bits in silicon paves the way to large quantum computers ...

Quantum cryptography at the speed of light: Researchers design first all-photonic repeaters ...