Spectral-Topological Superefficient Quantum Memory

TL;DR

This paper establishes a fundamental link between spectral-topological properties and high efficiency in broadband quantum memory, enabling optimized design for near-perfect quantum interfaces.

Contribution

It introduces a spectral-topological matching condition and an optimization approach to significantly enhance quantum memory efficiency.

Findings

Achieved quantum memory efficiency over 99.9%

Identified spectral-topological matching condition

Optimized absorber characteristics for broadband performance

Abstract

In this work we report about the fundamental correspondence between the high efficiency of the broadband quantum memory on multifrequency absorbers in the single-mode cavity and the topology of the observed frequency lines. We have found the spectral-topological matching condition by using the multiparametric optimization of the absorber characteristics which makes it possible to improve considerably the spectral efficiency of quantum memory under conditions of a real experiment. The elaborated approach opens the possibility for the creation of the broadband quantum interface consisting of a small number of the absorbers and characterized by the super-high quantum efficiency of more than 99.9%.