Related papers: Multiplexed quantum repeaters with hot multimode alkali-noble gas memories

Multiplexed quantum repeaters with hot multimode alkali-noble gas memories

URL: http://arxiv.org/abs/2402.17752v2
Date: Wed, 31 Jul 2024 10:58:42 GMT
Title: Multiplexed quantum repeaters with hot multimode alkali-noble gas memories
Authors: Alexandre Barbosa, Hugo Terças, Emmanuel Zambrini Cruzeiro,
Abstract summary: We propose a non-cryogenic optical quantum memory for noble-gas nuclear spins based on the Atomic Frequency Comb protocol. We discuss how these quantum memories can enhance rates in satellite quantum communication networks.
Score: 45.49722819849123
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: 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.

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