We seek to design experimentally feasible broadband, temporally multiplexed optical quantum memory with near-term applications to telecom bands. Specifically, we devise dispersion compensation for an impedance-matched narrow-band quantum memory by exploiting Raman processes over two three-level atomic subensembles, one for memory and the other for dispersion compensation. Dispersion compensation provides impedance matching over more than a full cavity linewidth. Combined with one second spin-coherence lifetime the memory could be capable of power efficiency exceeding 90% leading to 106 modes for temporal multiplexing. Our design could lead to significant multiplexing enhancement for quantum repeaters to be used for telecom quantum networks.
@article{arxiv.2106.15857,
title = {Broadband quantum memory in a cavity via zero spectral dispersion},
author = {E. S. Moiseev and Arina Tashchilina and S. A. Moiseev and Barry C. Sanders},
journal= {arXiv preprint arXiv:2106.15857},
year = {2021}
}