  In this paper, we propose a scheme of a long-lived broadband superefficient
multiresonator quantum memory in which a common resonator is connected with an
external waveguide and with a system of high-quality miniresonators containing
long-lived resonant electron spin ensembles. The scheme with 4 miniresonators
has been analyzed in details and it was shown that it is possible to store an
input broadband signal field to the electron spin ensembles with quantum
efficiency 99.99%. The considered multiresonator system opens the way to
elaboration of efficient multiqubit quantum memory devices for superconducting
quantum computer.
