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Dive into the research topics where Christopher Erven is active.

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Featured researches published by Christopher Erven.


Nature Communications | 2017

CHIP-BASED QUANTUM KEY DISTRIBUTION

Philip Sibson; Christopher Erven; Mark Godfrey; Shigehito Miki; Taro Yamashita; Mikio Fujiwara; Masahide Sasaki; Hirotaka Terai; Michael G. Tanner; Chandra M. Natarajan; Robert H. Hadfield; Jeremy L. O’Brien; Mark G. Thompson

Improvement in secure transmission of information is an urgent need for governments, corporations and individuals. Quantum key distribution (QKD) promises security based on the laws of physics and has rapidly grown from proof-of-concept to robust demonstrations and deployment of commercial systems. Despite these advances, QKD has not been widely adopted, and large-scale deployment will likely require chip-based devices for improved performance, miniaturization and enhanced functionality. Here we report low error rate, GHz clocked QKD operation of an indium phosphide transmitter chip and a silicon oxynitride receiver chip—monolithically integrated devices using components and manufacturing processes from the telecommunications industry. We use the reconfigurability of these devices to demonstrate three prominent QKD protocols—BB84, Coherent One Way and Differential Phase Shift—with performance comparable to state-of-the-art. These devices, when combined with integrated single photon detectors, pave the way for successfully integrating QKD into future telecommunications networks.


Optica | 2017

Integrated silicon photonics for high-speed quantum key distribution

Philip Sibson; Jake Kennard; Stasja Stanisic; Christopher Erven; Jeremy L. O’Brien; Mark G. Thompson

Integrated silicon photonics offers great potential for quantum communication devices in terms of robustness and scalability. Here we demonstrate high-speed low-error QKD using silicon photonic devices combining slow thermo-optic DC biases and fast carrier-depletion modulation.


New Journal of Physics | 2017

Absorption spectroscopy at the ultimate quantum limit from single-photon states

Rebecca Whittaker; Christopher Erven; Alex Neville; Monica Berry; Jeremy L. O’Brien; Hugo Cable; Jonathan C. F. Matthews

R. Whittaker, ∗ C. Erven, A. Neville, M. Berry, J. L. O’Brien, H. Cable, and J. C. F. Matthews † Centre for Quantum Photonics, H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering, University of Bristol, Merchant Venturers Building, Woodland Road, Bristol BS8 1UB, UK. H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol, BS8 1TL, UK. (Dated: August 5, 2015)


Journal of Lightwave Technology | 2017

Secure NFV Orchestration Over an SDN-Controlled Optical Network With Time-Shared Quantum Key Distribution Resources

Alejandro Aguado; Emilio Hugues-Salas; Paul Anthony Haigh; Jaume Marhuenda; Alasdair B. Price; Philip Sibson; Jake Kennard; Christopher Erven; John Rarity; Mark G. Thompson; Andrew Lord; Reza Nejabati; Dimitra Simeonidou

Quantum key distribution (QKD) is a state-of-the-art method of generating cryptographic keys by exchanging single photons. Measurements on the photons are constrained by the laws of quantum mechanics, and it is from this that the keys derive their security. Current public key encryption relies on mathematical problems that cannot be solved efficiently using present-day technologies; however, it is vulnerable to computational advances. In contrast QKD generates truly random keys secured against computational advances and more general attacks when implemented properly. On the other hand, networks are moving towards a process of softwarization with the main objective to reduce cost in both, the deployment and in the network maintenance. This process replaces traditional network functionalities (or even full network instances) typically performed in network devices to be located as software distributed across commodity data centers. Within this context, network function virtualization (NFV) is a new concept in which operations of current proprietary hardware appliances are decoupled and run as software instances. However, the security of NFV still needs to be addressed prior to deployment in the real world. In particular, virtual network function (VNF) distribution across data centers is a risk for network operators, as an eavesdropper could compromise not just virtualized services, but the whole infrastructure. We demonstrate, for the first time, a secure architectural solution for VNF distribution, combining NFV orchestration and QKD technology by scheduling an optical network using SDN. A time-shared approach is designed and presented as a cost-effective solution for practical deployment, showing the performance of different quantum links in a distributed environment.


international conference on optical mems and nanophotonics | 2016

Silicon quantum photonics

Joshua W. Silverstone; Jianwei Wang; Damien Bonneau; Philip Sibson; Raffaele Santagati; Christopher Erven; Jeremy L. O'Brien; Mark G. Thompson

Silicon integrated quantum photonics has recently emerged as a promising approach to realising complex and compact quantum circuits, where entangled states of light are generated and manipulated on-chip to realise applications in sensing, communication and computation. Recent highlights include chip-to-chip quantum communications, programmable quantum circuits, chip-based quantum simulations and routes to scalable quantum information processing.


optical fiber communication conference | 2018

Experimental Demonstration of DDoS Mitigation over a Quantum Key Distribution (QKD) Network Using Software Defined Networking (SDN)

Emilio Hugues-Salas; Foteini Ntavou; Yanni Ou; Jake Kennard; Catherine White; Dimitrios Gkounis; Konstantinos Nikolovgenis; George T. Kanellos; Christopher Erven; Aandrew Lord; Reza Nejabati; Dimitra Simeonidou


european conference on optical communication | 2017

First Experimental Demonstration of Secure NFV Orchestration over an SDN-Controlled Optical Network with Time-Shared Quantum Key Distribution

Alejandro Aguado; Emilio Hugues-Salas; Paul Anthony Haigh; Jaume Marhuenda; Alasdair B. Price; Philip Sibson; Jake Kennard; Christopher Erven; John Rarity; Mark G. Thompson; Andrew Lord; Reza Nejabati; Dimitra Simeonidou


7th International Conference in Quantum Cryptography (QCRYPT) | 2017

Quantum Key Distribution Without Sifting

Alasdair B. Price; John G. Rarity; Christopher Erven


International Conference for Young Quantum Information Scientists (YQIS) | 2016

Practical integration of Quantum Key Distribution with Next-Generation Networks

Alasdair B. Price; Alejandro Aguado; Emilio Hugues Salas; Paul Anthony Haigh; Philip Sibson; Jaume Marhuenda; Jake Kennard; John G. Rarity; Mark G. Thompson; Reza Nejabati; Dimitra Simeonidou; Christopher Erven


Frontiers in Optics | 2016

Advances in Silicon Quantum Photonics

Damien Bonneau; Josh Silverstone; Jianwei Wang; Philip Sibson; Raffaele Santagati; Christopher Erven; Jeremy L. O’Brien; Mark G. Thompson

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