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Storage and retrieval of single photons transmitted between remote quantum memories

Storage and retrieval of single photons transmitted between remote quantum memories
Storage and retrieval of single photons transmitted between remote quantum memories
An elementary quantum network operation involves storing a qubit state in an atomic quantum memory node, and then retrieving and transporting the information through a single photon excitation to a remote quantum memory node for further storage or analysis. Implementations of quantum network operations are thus conditioned on the ability to realize matter-to-light and/or light-to-matter quantum state mappings. Here we report the generation, transmission, storage and retrieval of single quanta using two remote atomic ensembles. A single photon is generated from a cold atomic ensemble at one site 1, and is directed to another site through 100 metres of optical fibre. The photon is then converted into a single collective atomic excitation using a dark-state polariton approach2. After a programmable storage time, the atomic excitation is converted back into a single photon. This is demonstrated experimentally, for a storage time of 0.5 microseconds, by measurement of an anti-correlation parameter. Storage times exceeding ten microseconds are observed by intensity cross-correlation measurements. This storage period is two orders of magnitude longer than the time required to achieve conversion between photonic and atomic quanta. The controlled transfer of single quanta between remote quantum memories constitutes an important step towards distributed quantum networks
0028-0836
833-836
Chanelière, T.
72549647-85a3-4a35-ad20-8606b542553d
Matsukevich, D.N.
178d5791-6289-4336-a788-e591ef406613
Jenkins, S.D.
65d861fb-b85a-4927-805a-7c906fca26c6
Lan, S.-Y.
68fed702-d589-426b-b196-ca846b937f99
Kennedy, T.A.B.
68040c42-1663-4a03-87f0-b09045cf5357
Kuzmich, A.
7f959cd2-805c-4cb6-8938-8d6abcd212ee
Chanelière, T.
72549647-85a3-4a35-ad20-8606b542553d
Matsukevich, D.N.
178d5791-6289-4336-a788-e591ef406613
Jenkins, S.D.
65d861fb-b85a-4927-805a-7c906fca26c6
Lan, S.-Y.
68fed702-d589-426b-b196-ca846b937f99
Kennedy, T.A.B.
68040c42-1663-4a03-87f0-b09045cf5357
Kuzmich, A.
7f959cd2-805c-4cb6-8938-8d6abcd212ee

Chanelière, T., Matsukevich, D.N., Jenkins, S.D., Lan, S.-Y., Kennedy, T.A.B. and Kuzmich, A. (2005) Storage and retrieval of single photons transmitted between remote quantum memories. Nature, 438 (7069), 833-836. (doi:10.1038/nature04315).

Record type: Article

Abstract

An elementary quantum network operation involves storing a qubit state in an atomic quantum memory node, and then retrieving and transporting the information through a single photon excitation to a remote quantum memory node for further storage or analysis. Implementations of quantum network operations are thus conditioned on the ability to realize matter-to-light and/or light-to-matter quantum state mappings. Here we report the generation, transmission, storage and retrieval of single quanta using two remote atomic ensembles. A single photon is generated from a cold atomic ensemble at one site 1, and is directed to another site through 100 metres of optical fibre. The photon is then converted into a single collective atomic excitation using a dark-state polariton approach2. After a programmable storage time, the atomic excitation is converted back into a single photon. This is demonstrated experimentally, for a storage time of 0.5 microseconds, by measurement of an anti-correlation parameter. Storage times exceeding ten microseconds are observed by intensity cross-correlation measurements. This storage period is two orders of magnitude longer than the time required to achieve conversion between photonic and atomic quanta. The controlled transfer of single quanta between remote quantum memories constitutes an important step towards distributed quantum networks

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Published date: 2005

Identifiers

Local EPrints ID: 176285
URI: http://eprints.soton.ac.uk/id/eprint/176285
ISSN: 0028-0836
PURE UUID: dff78d53-6be6-4645-8fca-e706ec069474

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Date deposited: 07 Mar 2011 14:34
Last modified: 16 Jul 2019 23:46

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Contributors

Author: T. Chanelière
Author: D.N. Matsukevich
Author: S.D. Jenkins
Author: S.-Y. Lan
Author: T.A.B. Kennedy
Author: A. Kuzmich

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