Towards high-speed optical quantum memories
Quantum memories, capable of controllably storing and releasing a photon, are a crucial component for quantum computers1 and quantum communications2. To date, quantum memories3-6 have operated with bandwidths that limit data rates to megahertz. Here we report the coherent storage and retrieval of su...
| Main Authors: | , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2010
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| _version_ | 1797099950896578560 |
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| author | Reim, K Nunn, J Lorenz, V Sussman, B Lee, K Langford, N Jaksch, D Walmsley, I |
| author_facet | Reim, K Nunn, J Lorenz, V Sussman, B Lee, K Langford, N Jaksch, D Walmsley, I |
| author_sort | Reim, K |
| collection | OXFORD |
| description | Quantum memories, capable of controllably storing and releasing a photon, are a crucial component for quantum computers1 and quantum communications2. To date, quantum memories3-6 have operated with bandwidths that limit data rates to megahertz. Here we report the coherent storage and retrieval of sub-nanosecond low-intensity light pulses with spectral bandwidths exceeding 1GHz in caesium vapour. The novel memory interaction takes place through a far off-resonant two-photon transition in which the memory bandwidth is dynamically generated by a strong control field7,8. This should allow data rates more than 100 times greater than those of existing quantum memories. The memory works with a total efficiency of 15%, and its coherence is demonstrated through direct interference of the stored and retrieved pulses. Coherence times in hot atomic vapours are on the order of microseconds, the expected storage time limit for this memory. © 2010 Macmillan Publishers Limited. All rights reserved. |
| first_indexed | 2024-03-07T05:30:47Z |
| format | Journal article |
| id | oxford-uuid:e2339619-85a3-4034-be3a-7a8fe799acfe |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T05:30:47Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | oxford-uuid:e2339619-85a3-4034-be3a-7a8fe799acfe2022-03-27T09:59:26ZTowards high-speed optical quantum memoriesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:e2339619-85a3-4034-be3a-7a8fe799acfeEnglishSymplectic Elements at Oxford2010Reim, KNunn, JLorenz, VSussman, BLee, KLangford, NJaksch, DWalmsley, IQuantum memories, capable of controllably storing and releasing a photon, are a crucial component for quantum computers1 and quantum communications2. To date, quantum memories3-6 have operated with bandwidths that limit data rates to megahertz. Here we report the coherent storage and retrieval of sub-nanosecond low-intensity light pulses with spectral bandwidths exceeding 1GHz in caesium vapour. The novel memory interaction takes place through a far off-resonant two-photon transition in which the memory bandwidth is dynamically generated by a strong control field7,8. This should allow data rates more than 100 times greater than those of existing quantum memories. The memory works with a total efficiency of 15%, and its coherence is demonstrated through direct interference of the stored and retrieved pulses. Coherence times in hot atomic vapours are on the order of microseconds, the expected storage time limit for this memory. © 2010 Macmillan Publishers Limited. All rights reserved. |
| spellingShingle | Reim, K Nunn, J Lorenz, V Sussman, B Lee, K Langford, N Jaksch, D Walmsley, I Towards high-speed optical quantum memories |
| title | Towards high-speed optical quantum memories |
| title_full | Towards high-speed optical quantum memories |
| title_fullStr | Towards high-speed optical quantum memories |
| title_full_unstemmed | Towards high-speed optical quantum memories |
| title_short | Towards high-speed optical quantum memories |
| title_sort | towards high speed optical quantum memories |
| work_keys_str_mv | AT reimk towardshighspeedopticalquantummemories AT nunnj towardshighspeedopticalquantummemories AT lorenzv towardshighspeedopticalquantummemories AT sussmanb towardshighspeedopticalquantummemories AT leek towardshighspeedopticalquantummemories AT langfordn towardshighspeedopticalquantummemories AT jakschd towardshighspeedopticalquantummemories AT walmsleyi towardshighspeedopticalquantummemories |