# Spectral properties of single photons from quantum emitters

## TL;DR

This paper theoretically analyzes the spectral properties of single photons emitted by quantum emitters, focusing on controlling photon wave packets for quantum network applications.

## Contribution

It introduces a theoretical framework for characterizing and tailoring the spectrum of photons emitted during spontaneous Raman transitions in three-level atomic systems.

## Key findings

- Photon wave packet spectra can be controlled via excitation parameters.
- Different excitation schemes affect the spectral properties of emitted photons.
- The work provides guidelines for optimizing photon emission in quantum networks.

## Abstract

Quantum networks require flying qubits that transfer information between the nodes. This may be implemented by means of single atoms (the nodes) that emit and absorb single photons (the flying qubits) and requires full control of photon absorption and emission by the individual emitters. In this work, we theoretically characterize the wave packet of a photon emitted by a single atom undergoing a spontaneous Raman transition in a three-level scheme. We investigate several excitation schemes that are experimentally relevant and discuss control parameters that allow one to tailor the spectrum of the emitted photon wave packet.