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Quantum Information

The Quantum Information Group (QIG) is developing a new approach to information technology that applies the fundamental laws of Quantum Physics to network communications and computing.

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Quantum Key Distribution

Quantum cryptography provides a secure means for distributing secret keys between two parties (usually referred to as Alice and Bob) on an optical network. A unique feature of the technique is that the secrecy of the keys is independent of the resources available to a hacker.

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Quantum Devices

Applications in quantum information technology, such as quantum cryptography and quantum computing, require new devices that generate and detect light at the quantum level. Toshiba have developed a generic nanotechnology for single photon generation and detection using semiconductor quantum dots.

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Latest Publications

Independent indistinguishable quantum light sources on a reconfigurable photonic integrated circuit
D. J. P. Ellis, A. J. Bennett, C. Dangel, J. P. Lee, J. P. Griffiths, T. A. Mitchell, T.-K. Paraiso, P. Spencer, D. A. Ritchie and A. J. Shields
Appl. Phys. Lett., vol 112, no 21, 211104 (5 pages), 22 May 2018 arXiv
Overcoming the rate-distance limit of quantum key distribution without quantum repeaters
M. Lucamarini, Z. L. Yuan, J. F. Dynes and A. J. Shields
Nature, vol 557, pp. 400-403 (17 May 2018), 2 May 2018
Best-Practice Criteria for Practical Security of Self-Differencing Avalanche Photodiode Detectors in Quantum Key Distribution
A. Koehler-Sidki, J. F. Dynes, M. Lucamarini, G. L. Roberts, A. W. Sharpe, Z. L. Yuan and A. J. Shields
Phys. Rev. Applied, vol 9, no 4, 044027, 18 April 2018
Field trial of a QKD and high-speed classical data hybrid metropolitan network (Conference Presentation)
A. Wonfor, H. Qin, R. Kumar, X. Tang, J. F. Dynes, A. J. Shields, R. V. Penty and I. H. White
Proceedings of SPIE, vol 10559, 1055907, 20 March 2018
Broadband Access Communication Technologies XII (SPIE OPTO 2018)
A quantum light-emitting diode for the standard telecom window around 1,550 nm
T. Müller, J. Skiba-Szymanska, A. B. Krysa, J. Huwer, M. Felle, M. Anderson, R. M. Stevenson, J. Heffernan, D. A. Ritchie and A. J. Shields
Nature Commun., vol 9, 862 (6 pages), 28 February 2018 free

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