Backward retrieval in optical quantum memory controlled by an external field

TL;DR

This paper proposes a method for backward retrieval in optical quantum memories using an external nonuniform electric or magnetic field to achieve phase conjugation, eliminating the need for coherent pulses, and discusses its implementation in solid-state materials.

Contribution

It introduces a novel scheme for backward retrieval in quantum memories controlled by external fields, avoiding coherent pulse use.

Findings

Scheme enables phase conjugation via external field application

Potential implementation in resonant solid-state materials

Facilitates backward retrieval without coherent pulses

Abstract

A scheme for backward retrieval in optical quantum memories in which information is stored in collective states of an extended resonant atomic ensemble is developed such that phase conjugation can be implemented by application of an external nonuniform electric (magnetic) field without use of coherent exciting pulses. The possibilities of realizing such a scheme using resonant solid-state materials are discussed.