Multiplexed quantum repeaters with hot multimode alkali-noble gas memories
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866909274722009088 |
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| author | Barbosa, Alexandre Terças, Hugo Cruzeiro, Emmanuel Zambrini |
| author_facet | Barbosa, Alexandre Terças, Hugo Cruzeiro, Emmanuel Zambrini |
| contents | We propose a non-cryogenic optical quantum memory for noble-gas nuclear spins based on the Atomic Frequency Comb (AFC) protocol. Owing to the hours-long coherence lifetimes of the noble-gas spins and the large bandwidth provided by the AFC independently of the optical depth, we estimate a time-bandwidth product of up to $9.7 \times 10^{15}$ for a realistic experimental configuration, using alkali-metal atoms as mediators. Leveraging this long-lived multimode memory, we propose a fiber-based quantum repeater scheme that could enable entanglement distribution across distances over $2000 \ \mathrm{km}$ with only $8$ elementary links, operating fully without cryogenics. Finally, we discuss how these quantum memories can enhance rates in satellite quantum communication networks. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_17752 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Multiplexed quantum repeaters with hot multimode alkali-noble gas memories Barbosa, Alexandre Terças, Hugo Cruzeiro, Emmanuel Zambrini Quantum Physics Quantum Gases We propose a non-cryogenic optical quantum memory for noble-gas nuclear spins based on the Atomic Frequency Comb (AFC) protocol. Owing to the hours-long coherence lifetimes of the noble-gas spins and the large bandwidth provided by the AFC independently of the optical depth, we estimate a time-bandwidth product of up to $9.7 \times 10^{15}$ for a realistic experimental configuration, using alkali-metal atoms as mediators. Leveraging this long-lived multimode memory, we propose a fiber-based quantum repeater scheme that could enable entanglement distribution across distances over $2000 \ \mathrm{km}$ with only $8$ elementary links, operating fully without cryogenics. Finally, we discuss how these quantum memories can enhance rates in satellite quantum communication networks. |
| title | Multiplexed quantum repeaters with hot multimode alkali-noble gas memories |
| topic | Quantum Physics Quantum Gases |
| url | https://arxiv.org/abs/2402.17752 |