dorsal/arxiv
View SchemaStorage and retrieval of single photons transmitted between remote quantum memories
| Authors | T. Chaneliere, D. N. Matsukevich, S. D. Jenkins, S. -Y. Lan, T. A. B. Kennedy, A. Kuzmich |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0511014 |
| URL | https://arxiv.org/abs/quant-ph/0511014 |
| DOI | 10.1038/nature04315 |
| Journal | Nature, 438, 833 (2005) |
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 such matter-to-light and/or light-to-matter quantum state mappings. Here, we report generation, transmission, storage and retrieval of single quanta using two remote atomic ensembles. A single photon is generated from a cold atomic ensemble at Site A via the protocol of Duan, Lukin, Cirac, and Zoller (DLCZ) [Nature v.414, 413 (2001)] and is directed to Site B through a 100 meter long optical fiber. The photon is converted into a single collective excitation via the dark-state polariton approach of Fleischhauer and Lukin [Phys. Rev. Lett. v.84, 5094 (2000)]. After a programmable storage time the atomic excitation is converted back into a single photon. This is demonstrated experimentally, for a storage time of 500 nanoseconds, by measurement of an anticorrelation parameter a. Storage times exceeding ten microseconds are observed by intensity cross-correlation measurements. The length of the storage period is two orders of magnitude longer than the time 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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"abstract": "An elementary quantum network operation involves storing a qubit state in an\natomic quantum memory node, and then retrieving and transporting the\ninformation through a single photon excitation to a remote quantum memory node\nfor further storage or analysis. Implementations of quantum network operations\nare thus conditioned on the ability to realize such matter-to-light and/or\nlight-to-matter quantum state mappings. Here, we report generation,\ntransmission, storage and retrieval of single quanta using two remote atomic\nensembles. A single photon is generated from a cold atomic ensemble at Site A\nvia the protocol of Duan, Lukin, Cirac, and Zoller (DLCZ) [Nature v.414, 413\n(2001)] and is directed to Site B through a 100 meter long optical fiber. The\nphoton is converted into a single collective excitation via the dark-state\npolariton approach of Fleischhauer and Lukin [Phys. Rev. Lett. v.84, 5094\n(2000)]. After a programmable storage time the atomic excitation is converted\nback into a single photon. This is demonstrated experimentally, for a storage\ntime of 500 nanoseconds, by measurement of an anticorrelation parameter a.\nStorage times exceeding ten microseconds are observed by intensity\ncross-correlation measurements. The length of the storage period is two orders\nof magnitude longer than the time to achieve conversion between photonic and\natomic quanta. The controlled transfer of single quanta between remote quantum\nmemories constitutes an important step towards distributed quantum networks.",
"arxiv_id": "quant-ph/0511014",
"authors": [
"T. Chaneliere",
"D. N. Matsukevich",
"S. D. Jenkins",
"S. -Y. Lan",
"T. A. B. Kennedy",
"A. Kuzmich"
],
"categories": [
"quant-ph"
],
"doi": "10.1038/nature04315",
"journal_ref": "Nature, 438, 833 (2005)",
"title": "Storage and retrieval of single photons transmitted between remote quantum memories",
"url": "https://arxiv.org/abs/quant-ph/0511014"
},
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