Optimal collection of radiation emitted by a trapped atomic ensemble

Abstract

Trapped atomic ensembles are convenient systems for quantum information storage in the long-lived sublevels of the electronic ground state and its conversion to propagating optical photons via stimulated Raman processes. Here we investigate a phase-matched emission of photons from a coherently prepared atomic ensemble. We consider an ensemble of cold atoms in an elongated harmonic trap with normal density distribution, and determine the parameters of paraxial optics to match the mode geometry of the emitted radiation and optimally collect it into an optical waveguide.

Collective emission of photons from dense, dipole-dipole interacting atomic ensembles

“…In turn, photons can serve as flying qubits to encode and reliably transmit quantum information over long-distances [25,26]. For optical photons, transmission may occur through free space or via fiber waveguides, and it is important to determine the spatiotemporal profile of the photon emitted by the atoms to optimally construct the paraxial optical elements that will collect the photon and direct it to a distant receiver [27].…”