John G. Rarity  is professor of optical communication systems in the department of electrical and electronic engineering at the University of Bristol, a post he has held since 1 January 2003. He is an international expert on quantum optics, quantum cryptography and quantum communication using single photons and entanglement. Rarity is a member of the Quantum Computation and Information group and quantum photonics at the University of Bristol.
John Rarity at the Royal Society admissions day in London, 2015
John G. Rarity
|Alma mater||University of Sheffield (BSc)|
Royal Military College of Science (PhD)
|Institutions||University of Bristol|
|Thesis||Number fluctuation spectroscopy applied to coagulating dispersions (1984)|
Research and careerEdit
Notable early achievements while at DERA included demonstrations of quantum interference and non-locality over large distances, demonstrating a violation of Bell's Inequality over 4 km of optical fibre in 1994. These experiments were followed by work in quantum cryptography, resulting in his team at DERA setting a world record of 1.9 km range for free space secure quantum cryptography. A collaboration with Ludwig-Maximilian University, Munich in 2002 successfully demonstrated an open air quantum cryptography experiment over a distance of 23.4 km.
Since moving to the University of Bristol, Rarity has built up a group working in experimental quantum optics. One project which has received substantial publicity recently in collaboration with the Quantum Information Processing group at HP Labs is developing affordable quantum key distribution systems. The scheme reduces the cost by using pulsed LEDs rather than lasers as the source of transmitted qubits.
In 2007 Rarity collaborated in a demonstration of quantum key distribution using free space optical communications over 144 km between the islands of Tenerife and La Palma.
His books include Microcavities and Photonic Bandgaps: Physics and Applications and highly cited papers include Practical quantum cryptography based on two-photon interferometry and Experimental violation of Bell's inequality based on phase and momentum.
Awards and honoursEdit
Rarity won the Thomas Young Medal and Prize in 1995.
- Anon (2015). "Professor John Rarity FRS – The Royal Society". royalsocety.org. Retrieved 1 May 2015. One or more of the preceding sentences incorporates text from the royalsociety.org website where:
“All text published under the heading 'Biography' on Fellow profile pages is available under Creative Commons Attribution 4.0 International License.” --Royal Society Terms, conditions and policies at the Wayback Machine (archived 2016-11-11)
- "University News – New chairs" (PDF). bristol.ac.uk. University of Bristol. April 2003. p. 9. Archived from the original (pdf) on 28 June 2006. Retrieved 25 July 2006.
- "Bristol University Physics—Centre for Quantum Photonics—Academic Staff". University of Bristol. Archived from the original on 8 February 2010. Retrieved 29 May 2010.
- John Rarity publications indexed by Google Scholar
- Bristol, University of. "Professor John Rarity - Faculty of Engineering". www.bris.ac.uk.
- Rarity, John G. (1984). Number fluctuation spectroscopy applied to coagulating dispersions (PhD thesis). Royal Military College of Science. OCLC 499808067. EThOS uk.bl.ethos.348636.
- "DERA Scientists achieve world record 1.9 km range for free-space secure key exchange using quantum cryptography". quiprocone.org (Press release). DERA. January 2001. Archived from the original on 28 September 2006. Retrieved 25 July 2006.
- "'Quantum ATM' rules out fraudulent web purchases". Cite journal requires
- J. L. Duligall; M. S. Godfrey; K. A. Harrison; W. J. Munro; J. G. Rarity (2006). "Low Cost and Compact Quantum Cryptography". New Journal of Physics. 8 (10). doi:10.1088/1367-2630/8/10/249.
- R. Ursin; F. Tiefenbacher; T. Schmitt-Manderbach; H. Weier; T. Scheidl; M. Lindenthal; B. Blauensteiner; T. Jennewein; J. Perdigues; P. Trojek; B. Ömer; M. Fürst; M. Meyenburg; J. Rarity; Z. Sodnik; C. Barbieri; H. Weinfurter; A. Zeilinger (2007). "Entanglement-based quantum communication over 144 km". arXiv:quant-ph/0607182. doi:10.1038/nphys629. Nature Physics 3, 481 – 486. Cite journal requires
- NATO Scientific Affairs Division (1996). C. Cargese; C. Weisbuch and John Rarity (eds.). Microcavities and Photonic Bandgaps: Physics and Applications. Springer. ISBN 0-7923-4170-8. OCLC 35055551.
- Artur K. Ekert; John G. Rarity; Paul R. Tapster; G. Massimo Palma (1992). "Practical quantum cryptography based on two-photon interferometry". Physical Review Letters. 69 (9): 1293–1295. Bibcode:1992PhRvL..69.1293E. doi:10.1103/PhysRevLett.69.1293. PMID 10047180.
- J. G. Rarity; P. R. Tapster (1990). "Experimental violation of Bell's inequality based on phase and momentum". Physical Review Letters. 64 (21): 2495–2498. Bibcode:1990PhRvL..64.2495R. doi:10.1103/PhysRevLett.64.2495. PMID 10041727.