Multimode Memories in Atomic Ensembles

TL;DR

This paper investigates the capacity of atomic ensemble-based quantum memories to store multiple optical modes, highlighting how controlled inhomogeneous broadening enhances their efficiency for quantum communication and computation.

Contribution

It provides a detailed analysis of multimode capacity in atomic ensembles and demonstrates the benefit of controlled inhomogeneous broadening.

Findings

Adding controlled inhomogeneous broadening significantly improves multimode capacity.

Different quantum memory protocols are evaluated for their multimode storage potential.

The study offers insights into optimizing atomic ensemble memories for quantum networks.

Abstract

The ability to store multiple optical modes in a quantum memory allows for increased efficiency of quantum communication and computation. Here we compute the multimode capacity of a variety of quantum memory protocols based on light storage in ensembles of atoms. We find that adding a controlled inhomogeneous broadening improves this capacity significantly.