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Title: Strong interaction between light and a single trapped atom without the need for a cavity
Authors: Tey, M.K. 
Chen, Z.
Aljunid, S.A. 
Chng, B. 
Huber, F.
Maslennikov, G. 
Kurtsiefer, C. 
Issue Date: Dec-2008
Citation: Tey, M.K., Chen, Z., Aljunid, S.A., Chng, B., Huber, F., Maslennikov, G., Kurtsiefer, C. (2008-12). Strong interaction between light and a single trapped atom without the need for a cavity. Nature Physics 4 (12) : 924-927. ScholarBank@NUS Repository.
Abstract: Many quantum information processing protocols require efficient transfer of quantum information from a flying photon to a stationary quantum system. To transfer information, a photon must first be absorbed by the quantum system. This can be achieved, with a probability close to unity, by an atom residing in a high-finesse cavity. However, it is unclear whether a photon can be absorbed effectively by an atom in a free space. Here, we report on an observation of substantial extinction of a light beam by a single 87Rb atom through focusing light to a small spot with a single lens. The measured extinction values can be directly compared to the predictions of existing free-space photon-atom coupling models. Our result should open a new perspective on processing quantum information carried by light using atoms, in particular for experiments that require strong absorption of single photons by an atom in free space. © 2008 Macmillan Publishers Limited. All rights reserved.
Source Title: Nature Physics
ISSN: 17452473
DOI: 10.1038/nphys1096
Appears in Collections:Staff Publications

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