Project funded by the Future and Emerging Technologies arm of the IST Programme FET-QIPC -RAMBOQ IST-2001-38864RAMBOQ pRobabilistic gAtes Making Binary.

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Project funded by the Future and Emerging Technologies arm of the IST Programme FET-QIPC -RAMBOQ IST RAMBOQ pRobabilistic gAtes Making Binary Optical Quanta J.G. Rarity Innsbruck, Feb 15th 2005 RAMBOQ Year 2 Success stories HP Labs Bristol UK IdQuantique Univ Erlangen Univ Queensland Australia

Project funded by the Future and Emerging Technologies arm of the IST Programme FET-QIPC -RAMBOQ IST RAMBOQ pRobabilistic gAtes Making Binary Optical Quanta For linear optics quantum computation and quantum networks we need: 1. High efficiency sources of single photons, entangled photons and interference between them. 2. A scalable 2-qubit CNOT gate. 3. High efficiency and long-distance teleportation and entanglement swapping. We have developed: RAMBOQ Year 2 Success stories Innsbruck, Feb 15 th 2005

Project funded by the Future and Emerging Technologies arm of the IST Programme FET-QIPC -RAMBOQ IST RAMBOQ pRobabilistic gAtes Making Binary Optical Quanta High efficiency pillar microcavity sources of pure state single photons. Waveguide sources of picosecond photon pairs

Project funded by the Future and Emerging Technologies arm of the IST Programme FET-QIPC -RAMBOQ IST RAMBOQ pRobabilistic gAtes Making Binary Optical Quanta A ‘scalable’ 2-qubit CNOT gate In the proposal Actual realisation Truth table Fidelity ~0.8

Project funded by the Future and Emerging Technologies arm of the IST Programme FET-QIPC -RAMBOQ IST RAMBOQ pRobabilistic gAtes Making Binary Optical Quanta long-distance entanglement swapping

Project funded by the Future and Emerging Technologies arm of the IST Programme FET-QIPC -RAMBOQ IST RAMBOQ pRobabilistic gAtes Making Binary Optical Quanta Other Highlights: Free-space distribution of entangled photon pairs over 7.8 km in an intra-city link Triggered qutrits for quantum information processing Quantum coin tossing protocol for distributed qutrits 4-photon path-entanglement for quantum metrology First worldwide bank transfer via entanglement-based QC Complete Bell-state analysis of entangled states 9 PRL and 2 Nature publications, 2 papers selected as 2004 highlights by IOP.