Multipulse addressing of a raman quantum memory: configurable beam splitting and efficient readout

Klaus F Reim, Josh Nunn, X-M Jin, PS Michelberger, TFM Champion, Duncan G England, KC Lee, WS Kolthammer, NK Langford, IA Walmsley

Research output: Contribution to journalArticlepeer-review

59 Citations (Scopus)

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.
Original languageEnglish
Article number263602
JournalPhysical Review Letters
Volume108
Issue number26
DOIs
Publication statusPublished - 2012

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