# Quantum technology: single-photon source

## TL;DR

This paper reviews the design and optimization of a single-photon source based on multiplexing SPDC sources, aiming to improve quantum optical systems for quantum information applications.

## Contribution

It introduces strategies for designing an efficient, optimized single-photon source using current technologies, based on multiplexing SPDC sources.

## Key findings

- Proposed a multiplexed single-photon source design
- Optimized the source for higher efficiency
- Demonstrated feasibility with existing technology

## Abstract

This report is a synthesis of my master thesis internship at the National Institute of Informatics (NII) in Tokyo, Japan, that lasted during the summer of year 2012. I worked in the Quantum Information Science Theory (QIST) group under supervision of Prof. Kae Nemoto and Dr. Simon Devitt. This group works on theoretical and experimental implementations of quantum information science. The aim of my project was to study and improve quantum optical systems. I first studied different fields and systems of quantum information science. Then I focused my research on single-photon sources, entangled photon sources and interferometric photonic switches. Finally, I found some strategies to design an efficient and optimized single-photon source that could be built with today's technologies. This report describes in details the created and optimized design of a single-photon source based on time and space multiplexing of Spontaneous Parametric Downconversion (SPDC) sources.