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QES Seminar, 4/26/10: Integrated photon-atom interface for quantum information

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W. Tittel
Institute for Quantum Information Science, and Department of Physics & Astronomy
University of Calgary, Canada

Quantum memory, or the interface between traveling and stationary carriers of quantum information, light and atoms, constitutes a key element for quantum repeaters [1]. Impressive experimental and theoretical progress has been reported over the past few years [2], and gives hope that a workable quantum memory can eventually be built.
I will briefly introduce the importance of quantum memory for the future of long-distance quantum communication, outline a specific approach to quantum memory based on photon-echoes [3], and present the first demonstration of a quantum memory protocol in a waveguiding media, namely a Ti:Tm:LiNbO3 waveguide cooled to 3K. This integrated approach allows high-speed, electro-optic control of quantum state evolution during storage and is promising for  integration with fibre technology and into future fibre optic quantum networks.
[1] N. Sangouard, C. Simon, H. De Riedmatten, and N. Gisin, Quantum repeaters based on atomic ensembles and linear optics, http://lanl.arxiv.org/abs/0906.2699.
[2] A. Lvovsky, B.C. Sanders, and W. Tittel, Optical quantum memory, Nature Photonics 3, 706 - 714 (2009).
[3] W. Tittel, M. Afzelius, T. Chanelière, R. Cone, S. Kröll, S.A. Moiseev, and M. Sellars, Photon echo quantum memory in solid state systems, Laser&Photonics Reviews 4 (2), 244-267 (2010).

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Dr. Wolfgang Tittel  +1 403 220 4760
NSERC/GDC/iCORE Industrial Research Chair in Quantum Cryptoraphy and Communication
University of Calgary

Location: Bowen Hall Atrium

Date/Time: 04/26/10 at 12:30 pm - 04/26/10 at 01:30 am

Category: PRISM/MITRE (QES) Seminar Series

Department: PRISM