Efficient multi-mode quantum memory based on photon echo in optimal QED cavity

TL;DR

This paper proposes a highly efficient multi-mode quantum memory using photon echo in a QED cavity, with analytical and numerical analysis showing near-unity efficiency under optimal conditions.

Contribution

It introduces an analytical solution for quantum memory efficiency in a multi-atomic ensemble within a QED cavity, achieving near-perfect efficiency with optimal parameters.

Findings

Quantum memory efficiency can reach unity with optimal cavity and atomic parameters.

Numerical estimates show high efficiency in optically thin atomic systems.

Analytical solutions validate the feasibility of the proposed quantum memory scheme.

Abstract

Effective multi-mode photon echo based quantum memory on multi-atomic ensemble in the QED cavity is proposed. Analytical solution is obtained for the quantum memory efficiency that can be equal unity when optimal relations for the cavity and atomic parameters are held. Numerical estimation for realistic atomic and cavity parameters demonstrates the high efficiency of the quantum memory for optically thin resonant atomic system.