Multi-pulse addressing of a Raman quantum memory: configurable beam splitting and efficient readout

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 to coherently couple optical modes. He...

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Bibliographic Details
Published in:arXiv.org 2012-03
Main Authors: Reim, K F, Nunn, J, X -M Jin, Michelberger, P S, Champion, T F M, England, D G, Lee, K C, Langford, N K, Walmsley, I A
Format: Article
Language:English
Subjects:
Beam splitters
Data processing
Electronic devices
Photonics
Photons
Quantum computing
Quantum phenomena
Quantum theory
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Summary: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 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.
ISSN:2331-8422
DOI:10.48550/arxiv.1203.2328