Quantum random number generators in integrated photonics
Random numbers find applications in a range of different fields, from quantum key distribution and classical cryptography to fundamental science. They also find extensive use in gambling and lotteries. By exploiting the probabilistic nature of Quantum Mechanics, quantum random number generators (QRN...
Main Author: | |
---|---|
Other Authors: | |
Published: |
University of Bristol
2019
|
Online Access: | https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.767993 |
id |
ndltd-bl.uk-oai-ethos.bl.uk-767993 |
---|---|
record_format |
oai_dc |
spelling |
ndltd-bl.uk-oai-ethos.bl.uk-7679932019-04-10T01:08:37ZQuantum random number generators in integrated photonicsRaffaelli, FrancescoMatthews, Jonathan2019Random numbers find applications in a range of different fields, from quantum key distribution and classical cryptography to fundamental science. They also find extensive use in gambling and lotteries. By exploiting the probabilistic nature of Quantum Mechanics, quantum random number generators (QRNGs) provide a secure and efficient means to produce random numbers. Most of the quantum random number generators demonstrated so far have been built in bulk optics, either using free space or fibre-optic components. While showing good performance, most of these demonstrations are strongly limited in real life applications, due to issues such as size, costs and the manufacturing process. In this thesis I report the demonstration of three different QRNGs based on integrated photonics. First, I demonstrated a QRNG based on homodyne measurement of optical vacuum states on a Silicon-on-insulator (SOI) chip. Second, I developed a SOI QRNG based on phase fluctuations from a laser diode. In these two schemes all the optical and opto-electronic components, excluding the laser, were integrated onto a silicon-on-insulator device. These schemes, being built on a silicon-on-insulator chip are potentially CMOS compatible and pave the way for being integrated onto other more complex systems. These QRNGs showed Gbps generation rates and passed the statistical tests provided by NIST. Third, I report the preliminary study of a QRNG based on homodyne measurement of optical vacuum states onto a Indium Phosphide (InP) chip. In this third experiment, all the components, including a laser diode, were monolithically integrated in the same chip, which provide a great advantage in terms of the overall size of the optics of the device.University of Bristolhttps://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.767993http://hdl.handle.net/1983/b20b0798-755d-4a57-843f-3951805e9f53Electronic Thesis or Dissertation |
collection |
NDLTD |
sources |
NDLTD |
description |
Random numbers find applications in a range of different fields, from quantum key distribution and classical cryptography to fundamental science. They also find extensive use in gambling and lotteries. By exploiting the probabilistic nature of Quantum Mechanics, quantum random number generators (QRNGs) provide a secure and efficient means to produce random numbers. Most of the quantum random number generators demonstrated so far have been built in bulk optics, either using free space or fibre-optic components. While showing good performance, most of these demonstrations are strongly limited in real life applications, due to issues such as size, costs and the manufacturing process. In this thesis I report the demonstration of three different QRNGs based on integrated photonics. First, I demonstrated a QRNG based on homodyne measurement of optical vacuum states on a Silicon-on-insulator (SOI) chip. Second, I developed a SOI QRNG based on phase fluctuations from a laser diode. In these two schemes all the optical and opto-electronic components, excluding the laser, were integrated onto a silicon-on-insulator device. These schemes, being built on a silicon-on-insulator chip are potentially CMOS compatible and pave the way for being integrated onto other more complex systems. These QRNGs showed Gbps generation rates and passed the statistical tests provided by NIST. Third, I report the preliminary study of a QRNG based on homodyne measurement of optical vacuum states onto a Indium Phosphide (InP) chip. In this third experiment, all the components, including a laser diode, were monolithically integrated in the same chip, which provide a great advantage in terms of the overall size of the optics of the device. |
author2 |
Matthews, Jonathan |
author_facet |
Matthews, Jonathan Raffaelli, Francesco |
author |
Raffaelli, Francesco |
spellingShingle |
Raffaelli, Francesco Quantum random number generators in integrated photonics |
author_sort |
Raffaelli, Francesco |
title |
Quantum random number generators in integrated photonics |
title_short |
Quantum random number generators in integrated photonics |
title_full |
Quantum random number generators in integrated photonics |
title_fullStr |
Quantum random number generators in integrated photonics |
title_full_unstemmed |
Quantum random number generators in integrated photonics |
title_sort |
quantum random number generators in integrated photonics |
publisher |
University of Bristol |
publishDate |
2019 |
url |
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.767993 |
work_keys_str_mv |
AT raffaellifrancesco quantumrandomnumbergeneratorsinintegratedphotonics |
_version_ |
1719016839058554880 |