High-Fidelity Polarization Storage in a Gigahertz Bandwidth Quantum Memory
We demonstrate a dual-rail optical Raman memory inside a polarization interferometer; this enables us to store polarization-encoded information at GHz bandwidths in a room-temperature atomic ensemble. By performing full process tomography on the system we measure up to 97\pm1% process fidelity for t...
| Main Authors: | , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2011
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| _version_ | 1797074397905813504 |
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| author | England, D Michelberger, P Champion, T Reim, K Lee, K Sprague, MR Jin, X Langford, N Kolthammer, W Nunn, J Walmsley, I |
| author_facet | England, D Michelberger, P Champion, T Reim, K Lee, K Sprague, MR Jin, X Langford, N Kolthammer, W Nunn, J Walmsley, I |
| author_sort | England, D |
| collection | OXFORD |
| description | We demonstrate a dual-rail optical Raman memory inside a polarization interferometer; this enables us to store polarization-encoded information at GHz bandwidths in a room-temperature atomic ensemble. By performing full process tomography on the system we measure up to 97\pm1% process fidelity for the storage and retrieval process. At longer storage times, the process fidelity remains high, despite a loss of efficiency. The fidelity is 86\pm4% for 1.5 \mu s storage time, which is 5,000 times the pulse duration. Hence high fidelity is combined with a large time-bandwidth product. This high performance, with an experimentally simple setup, demonstrates the suitability of the Raman memory for integration into large-scale quantum networks. |
| first_indexed | 2024-03-06T23:35:33Z |
| format | Journal article |
| id | oxford-uuid:6d88be5a-fe5d-4184-9c2c-7f6766d787df |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T23:35:33Z |
| publishDate | 2011 |
| record_format | dspace |
| spelling | oxford-uuid:6d88be5a-fe5d-4184-9c2c-7f6766d787df2022-03-26T19:18:22ZHigh-Fidelity Polarization Storage in a Gigahertz Bandwidth Quantum MemoryJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:6d88be5a-fe5d-4184-9c2c-7f6766d787dfEnglishSymplectic Elements at Oxford2011England, DMichelberger, PChampion, TReim, KLee, KSprague, MRJin, XLangford, NKolthammer, WNunn, JWalmsley, IWe demonstrate a dual-rail optical Raman memory inside a polarization interferometer; this enables us to store polarization-encoded information at GHz bandwidths in a room-temperature atomic ensemble. By performing full process tomography on the system we measure up to 97\pm1% process fidelity for the storage and retrieval process. At longer storage times, the process fidelity remains high, despite a loss of efficiency. The fidelity is 86\pm4% for 1.5 \mu s storage time, which is 5,000 times the pulse duration. Hence high fidelity is combined with a large time-bandwidth product. This high performance, with an experimentally simple setup, demonstrates the suitability of the Raman memory for integration into large-scale quantum networks. |
| spellingShingle | England, D Michelberger, P Champion, T Reim, K Lee, K Sprague, MR Jin, X Langford, N Kolthammer, W Nunn, J Walmsley, I High-Fidelity Polarization Storage in a Gigahertz Bandwidth Quantum Memory |
| title | High-Fidelity Polarization Storage in a Gigahertz Bandwidth Quantum
Memory |
| title_full | High-Fidelity Polarization Storage in a Gigahertz Bandwidth Quantum
Memory |
| title_fullStr | High-Fidelity Polarization Storage in a Gigahertz Bandwidth Quantum
Memory |
| title_full_unstemmed | High-Fidelity Polarization Storage in a Gigahertz Bandwidth Quantum
Memory |
| title_short | High-Fidelity Polarization Storage in a Gigahertz Bandwidth Quantum
Memory |
| title_sort | high fidelity polarization storage in a gigahertz bandwidth quantum memory |
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