Superefficient long-lived multiresonator quantum memory

TL;DR

This paper introduces a multiresonator quantum memory scheme that achieves near-perfect efficiency for broadband signals, potentially advancing multiqubit quantum memory for superconducting quantum computers.

Contribution

It proposes a novel multiresonator quantum memory design with high efficiency and long storage times, specifically analyzing a system with four miniresonators.

Findings

Quantum efficiency of 99.99% demonstrated

Broadband signal storage achieved

Potential for multiqubit quantum memory devices

Abstract

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.