2024/02/27 by Alexandre de Freitas Barbosa, Barbosa, Alexandre, Hugo Terças +3
Engineering · Physics and Astronomy · #Perovskite Materials and Applications #Semiconductor Quantum Structures and Devices #Quantum optics and atomic interactions
paper · pdf · doi:10.48550/arxiv.2402.17752
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 × 1015 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 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.