Theory of noise suppression in {\Lambda}-type quantum memories by means of a cavity

Quantum memories, capable of storing single photons or other quantum states of light, to be retrieved on-demand, offer a route to large-scale quantum information processing with light. A promising class of memories is based on far-off-resonant Raman absorption in ensembles of \(\Lambda\)-type atoms....

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Bibliographic Details
Published in:arXiv.org 2016-01
Main Authors: Nunn, J, Thomas, S, Munns, J H D, Kaczmarek, K T, Qiu, C, Feizpour, A, Poem, E, Brecht, B, Saunders, D J, Ledingham, P M, Reddy, Dileep V, Raymer, M G, Walmsley, I A
Format: Article
Language:English
Subjects:
Data processing
Four-wave mixing
Photons
Quantum phenomena
Quantum theory
Storage
Online Access:Get full text
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Summary:Quantum memories, capable of storing single photons or other quantum states of light, to be retrieved on-demand, offer a route to large-scale quantum information processing with light. A promising class of memories is based on far-off-resonant Raman absorption in ensembles of \(\Lambda\)-type atoms. However at room temperature these systems exhibit unwanted four-wave mixing, which is prohibitive for applications at the single-photon level. Here we show how this noise can be suppressed by placing the storage medium inside a moderate-finesse optical cavity, thereby removing the main roadblock hindering this approach to quantum memory.
ISSN:2331-8422
DOI:10.48550/arxiv.1601.00157