Optical quantum memory for polarization qubits with V-type three-level atoms

TL;DR

This paper proposes a compact optical quantum memory scheme using V-type three-level atoms and CRIB technique, capable of storing polarization qubits without requiring separate media, and analyzes phase noise effects.

Contribution

It introduces a novel quantum memory scheme for polarization qubits using V-type atoms, eliminating the need for spatially separated media and addressing phase noise issues.

Findings

Successful theoretical demonstration of storing and retrieving polarization qubits.

Analysis of phase noise impacts on memory performance.

Potential for more compact and efficient quantum memory implementations.

Abstract

We investigate an optical quantum memory scheme with V-type three-level atoms based on the controlled reversible inhomogeneous broadening (CRIB) technique. We theoretically show the possibility to store and retrieve a weak light pulse interacting with the two optical transitions of the system. This scheme implements a quantum memory for a polarization qubit - a single photon in an arbitrary polarization state - without the need of two spatially separated two-level media, thus offering the advantage of experimental compactness overcoming the limitations due to mismatching and unequal efficiencies that can arise in spatially separated memories. The effects of a relative phase change between the atomic levels, as well as of phase noise due to, for example, the presence of spurious electric and magnetic fields are analyzed.