In this paper we present universal broadband multi-resonator quantum memory (MR-QM) based on the spatial-frequency combs of the microresonators coupled with a common waveguide. Here we found new Bragg-type impedance matching condition for the coupling of the microresonators with a waveguide field which provides an efficient broadband quantum storage. The obtained analytical solution for the microresonator fields enables sustainable parametric control of all the memory characteristics.

We study spectral properties of a cascaded multiresonator microwave quantum memory integrated into a waveguide-resonator system. On the basis of experimental data, we reconstruct the internal parameters of the circuit under study, give estimates of quantum efficiency, and show the possibility of achieving optimal conditions for its realization.

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