Optical quantum memory with generalized time-reversible atom-light interactions

TL;DR

This paper presents a generalized quantum memory scheme using controllable atomic dephasing, extending time-reversible atom-light interactions from weak to strong fields and linear to non-linear regimes, with a unified framework for various implementations.

Contribution

It introduces a comprehensive framework for quantum memory based on controllable dephasing, unifying different approaches like inhomogeneous broadening and atomic frequency combs.

Findings

Applicable to both weak and strong light fields.

Enables storage and manipulation of quantum states.

Provides a unified theoretical framework.

Abstract

We examine a quantum memory scheme based on controllable dephasing of atomic coherence of a non-resonant, inhomogeneously broadened Raman transition. We show that it generalizes the physical conditions for time-reversible interaction between light and atomic ensembles from weak to strong fields and from linear to non-linear interactions. We also develop a unified framework for different realizations exploiting either controlled reversible inhomogeneous broadening or atomic frequency combs, and discuss new aspects related to storage and manipulation of quantum states.