A. Shields

Publications468
h-index62
Citations15,297
Highly Influential Citations278
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Field test of quantum key distribution in the Tokyo QKD Network.
TLDR
Two GHz-clocked QKD links enable the world-first secure TV conferencing over a distance of 45km to be demonstrated and detection of an eavesdropper, rerouting into a secure path, and key relay via trusted nodes are demonstrated in this network.
Quantum key distribution over 122 km of standard telecom fiber
We report a demonstration of quantum key distribution over a standard telecom fiber exceeding 100 km in length. Through careful optimization of the interferometer and single photon detector, we…
Overcoming the rate–distance limit of quantum key distribution without quantum repeaters
TLDR
This work introduces an alternative scheme for QKD whereby pairs of phase-randomized optical fields are first generated at two distant locations and then combined at a central measuring station, enabling a form of quantum key distribution that can exceed the secret-key capacity without using quantum repeaters and that has security independent of the measuring devices.
Semiconductor quantum light sources
Lasers and LEDs have a statistical distribution in the number of photons emitted within a given time interval. Applications exploiting the quantum properties of light require sources for which either…
Quantum key distribution for 10 Gb/s dense wavelength division multiplexing networks
We demonstrate quantum key distribution (QKD) with bidirectional 10 Gb/s classical data channels in a single fiber using dense wavelength division multiplexing. Record secure key rates of 2.38 Mbps…
10-Mb/s Quantum Key Distribution
TLDR
The first quantum-key-distribution (QKD) systems capable of delivering sustainable, real-time secure keys continuously at rates exceeding 10 Mb/s are reported, and the robustness and long-term stability on a second QKD system continuously running for 1 month without any user invention is confirmed.
The SECOQC quantum key distribution network in Vienna
In this paper, we present the quantum key distribution (QKD) network designed and implemented by the European project SEcure COmmunication based on Quantum Cryptography (SECOQC) (2004?2008), unifying…
A semiconductor source of triggered entangled photon pairs
TLDR
This work demonstrates triggered photon pair emission from single quantum dots suggestive of polarization entanglement by tuning the splitting to zero, and suggests that a triggered entangled photon pair source could be implemented by a simple semiconductor light-emitting diode.
An entangled-light-emitting diode
TLDR
The realization of an electrically driven source of entangled photon pairs, consisting of a quantum dot embedded in a semiconductor light-emitting diode (LED) structure, shows its potential function as an on-demand source without the need for a complicated laser driving system, and is at present the best source on which to base future scalable quantum information applications.
Gigahertz decoy quantum key distribution with 1 Mbit/s secure key rate.
We report the first gigahertz clocked decoy-protocol quantum key distribution (QKD). Record key rates have been achieved thanks to the use of self-differencing InGaAs avalanche photodiodes designed…
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