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Two years ago researchers at Duke University in the US unveiled the first “invisibility cloak” — a device that can make objects vanish from sight, at least when viewed using a narrow band of microwave frequencies. Now, Ulf Leonhardt of St Andrew’s University in the UK and Tomás Tyc of Masaryk University in the Czech Republic have come up with a new way of using mathematics to describe a invisibility cloak (Science DOI: 10.1126/science.1166332).

CIFAR’s Quantum Information Processing Program is seeking outstanding researchers to fill two Junior Fellow positions (i.e., postdoctoral fellowships). The Canadian Institute for Advanced Research (CIFAR) is a catalyst for discovery, incubating ideas that revolutionize the international research community. The Quantum Information Processing (QIP) Program studies a wide range of topics relating to quantum information, including experimental and theoretical physics, theoretical computer science, and mathematical aspects of quantum information.

The entanglement of quantum bits (or qubits) is what should allow quantum computers to perform certain calculations much faster than the computers we use today. But now, physicists in Germany and Canada are saying that most qubits could be “too entangled” to be of any use in quantum computers.

Applications are invited for a postdoctoral position in the solid state quantum computing theory group at University at Buffalo, SUNY. The nominal starting time is September 2009, although earlier starting time is possible. Current research interests within the group include decoherence of multi-qubit systems, entanglement through a spin bus, coherent control of a spin bus, and entanglement and quantum correlations near quantum phase transitions.

The Quantum Information Processing (QIP) Group is based in HP Labs Bristol UK, and is part of the Information and Quantum Systems Laboratory (IQSL). The QIP group is seeking applicants for a fixed-term research appointment for two years, to work on the next stages of the implementation of "consumer quantum key distribution", HP's most advanced quantum information technology. The appointee will carry out research and development on short-range, free-space QKD for consumer applications.

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