Multipulse Addressing of a Raman Quantum Memory: Configurable Beam Splitting and Efficient Readout

K. F. Reim, J. Nunn, X.-M. Jin, P. S. Michelberger, T. F. M. Champion, D. G. England, K. C. Lee, W. S. Kolthammer, N. K. Langford, and I. A. Walmsley
Phys. Rev. Lett. 108, 263602 – Published 26 June 2012

Abstract

Quantum memories are vital to the scalability of photonic quantum information processing (PQIP), since the storage of photons enables repeat-until-success strategies. On the other hand, the key element of all PQIP architectures is the beam splitter, which allows us to coherently couple optical modes. Here, we show how to combine these crucial functionalities by addressing a Raman quantum memory with multiple control pulses. The result is a coherent optical storage device with an extremely large time bandwidth product, that functions as an array of dynamically configurable beam splitters, and that can be read out with arbitrarily high efficiency. Networks of such devices would allow fully scalable PQIP, with applications in quantum computation, long distance quantum communications and quantum metrology.

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  • Received 19 March 2012

DOI:https://doi.org/10.1103/PhysRevLett.108.263602

© 2012 American Physical Society

Authors & Affiliations

K. F. Reim1,2,*, J. Nunn1, X.-M. Jin1,3, P. S. Michelberger1, T. F. M. Champion1, D. G. England1, K. C. Lee1, W. S. Kolthammer1, N. K. Langford1,4, and I. A. Walmsley1

  • 1Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
  • 2Department of Physics, ETH Zürich, CH-8093 Zürich, Switzerland
  • 3Centre for Quantum Technologies, National University of Singapore, 117543, Singapore
  • 4Department of Physics, Royal Holloway, University of London, Egham Hill, Egham TW20 0EX, United Kingdom

  • *reimk@phys.ethz.ch

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Vol. 108, Iss. 26 — 29 June 2012

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