Single-atom quantum memory with degenerate atomic levels

TL;DR

This paper presents a theoretical study of a single-atom quantum memory capable of storing and retrieving a photon polarization qubit using STIRAP in atoms with degenerate levels, analyzing how polarization and atomic states affect storage probability.

Contribution

It introduces a comprehensive theoretical model for single-photon quantum memory utilizing degenerate atomic levels and arbitrary polarization, expanding understanding of storage dynamics.

Findings

Storage probability depends on laser polarization and atomic initial state.

Theoretical framework accommodates arbitrary atomic angular momenta and laser polarization.

Insights into optimizing quantum memory performance for different atomic configurations.

Abstract

The storage and retrieval of a single-photon polarization q-bit by means of STIRAP through the atoms with degenerate levels is studied theoretically for arbitrary polarization of the driving laser field and arbitrary values of the angular momenta of resonant atomic levels. The dependence of the probability of long-term photon storage on the polarization of the driving field and on the initial atomic state is examined.