Preparing narrow velocity distributions for quantum memories in room-temperature alkali-metal vapors
Quantum memories are a crucial technology for enabling large-scale quantum networks through synchronization of probabilistic operations. Such networks impose strict requirements on quantum memory, such as storage time, retrieval efficiency, bandwidth, and scalability. On- and off-resonant ladder pro...
| Main Authors: | , , , , , |
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| Format: | Journal article |
| Language: | English |
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American Physical Society
2021
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| _version_ | 1826275116543115264 |
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| author | Main, D Hird, TM Ledingham, P Saunders, D Walmsley, IAN Gao, S |
| author_facet | Main, D Hird, TM Ledingham, P Saunders, D Walmsley, IAN Gao, S |
| author_sort | Main, D |
| collection | OXFORD |
| description | Quantum memories are a crucial technology for enabling large-scale quantum networks through synchronization of probabilistic operations. Such networks impose strict requirements on quantum memory, such as storage time, retrieval efficiency, bandwidth, and scalability. On- and off-resonant ladder protocols on warm atomic vapor platforms are promising candidates, combining efficient high-bandwidth operation with low-noise on-demand retrieval. However, their storage time is severely limited by motion-induced dephasing caused by the broad velocity distribution of atoms composing the vapor. In this paper, we demonstrate velocity selective optical pumping to overcome this decoherence mechanism. This will increase the achievable memory storage time of vapor memories. This technique can also be used for preparing arbitrarily shaped absorption profiles, for instance, preparing an atomic frequency comb absorption feature.
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| first_indexed | 2024-03-06T22:53:48Z |
| format | Journal article |
| id | oxford-uuid:5fb3f182-c133-4e55-8bbc-11d44a8f00ef |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T22:53:48Z |
| publishDate | 2021 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | oxford-uuid:5fb3f182-c133-4e55-8bbc-11d44a8f00ef2022-03-26T17:48:35ZPreparing narrow velocity distributions for quantum memories in room-temperature alkali-metal vaporsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:5fb3f182-c133-4e55-8bbc-11d44a8f00efEnglishSymplectic ElementsAmerican Physical Society2021Main, DHird, TMLedingham, PSaunders, DWalmsley, IANGao, SQuantum memories are a crucial technology for enabling large-scale quantum networks through synchronization of probabilistic operations. Such networks impose strict requirements on quantum memory, such as storage time, retrieval efficiency, bandwidth, and scalability. On- and off-resonant ladder protocols on warm atomic vapor platforms are promising candidates, combining efficient high-bandwidth operation with low-noise on-demand retrieval. However, their storage time is severely limited by motion-induced dephasing caused by the broad velocity distribution of atoms composing the vapor. In this paper, we demonstrate velocity selective optical pumping to overcome this decoherence mechanism. This will increase the achievable memory storage time of vapor memories. This technique can also be used for preparing arbitrarily shaped absorption profiles, for instance, preparing an atomic frequency comb absorption feature. |
| spellingShingle | Main, D Hird, TM Ledingham, P Saunders, D Walmsley, IAN Gao, S Preparing narrow velocity distributions for quantum memories in room-temperature alkali-metal vapors |
| title | Preparing narrow velocity distributions for quantum memories in room-temperature alkali-metal vapors |
| title_full | Preparing narrow velocity distributions for quantum memories in room-temperature alkali-metal vapors |
| title_fullStr | Preparing narrow velocity distributions for quantum memories in room-temperature alkali-metal vapors |
| title_full_unstemmed | Preparing narrow velocity distributions for quantum memories in room-temperature alkali-metal vapors |
| title_short | Preparing narrow velocity distributions for quantum memories in room-temperature alkali-metal vapors |
| title_sort | preparing narrow velocity distributions for quantum memories in room temperature alkali metal vapors |
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