Saturday, October 10, 2015

Australian Researchers Build Quantum Logic Gate in Silicon

Researchers at the University of New South Wales in Australia have built a quantum logic gate in silicon for the first time -- a major step toward quantum computers.


“We’ve demonstrated a two-qubit logic gate – the central building block of a quantum computer – and, significantly, done it in silicon. Because we use essentially the same device technology as existing computer chips, we believe it will be much easier to manufacture a full-scale processor chip than for any of the leading designs, which rely on more exotic technologies," stated Andrew Dzurak, Scientia Professor and Director of the Australian National Fabrication Facility at UNSW.

“This makes the building of a quantum computer much more feasible, since it is based on the same manufacturing technology as today’s computer industry,” he added.

Professor Kohei M. Itoh from Keio University in Japan provided specialised silicon wafers for the project.

http://newsroom.unsw.edu.au/news/science-tech/crucial-hurdle-overcome-quantum-computing

NIST Researchers Teleport Quantum State over 100km of Fiber


Researchers from the National Institute of Standards and Technology (NIST) and NTT have transferred quantum information carried in light particles over 100 km of optical fiber, four times farther than the previous record. The breakthrough could lead to quantum repeaters, opening the door to quantum communications over long distances of fiber. Previously, quantum state has been teleported over free space, but transfers over optical have been limited...

NTT and University of Tokyo Cite Progress in Quantum Cryptography


Nippon Telegraph and Telephone(NTT) and The University of Tokyo reported progress in developing a quantum cryptography scheme that can assure security without monitoring the error rate of photon transmission. In an article in the UK science journal “Nature Photonics”, the researchers describe a quantum key distribution (QKD) experiment based on a novel QKD scheme called the round-robin differential phase shift (RRDPS) protocol. NTT said the experiment...

Intel Invests in QuTech for Quantum Computing


Intel will invest US$50 million and provide significant engineering resources to Delft University of Technology and TNO, the Dutch Organisation for Applied Research, to accelerate advancements in quantum computing. Intel said its goal is to extend the university's physics expertise and diverse quantum computing research efforts by contributing advanced manufacturing, electronics and architectural expertise. "A fully functioning quantum computer...


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