Photonic Quantum Information
Introduction
This area started in 2003 and has quickly established high quality research in secure quantum key distribution, photon sources, quantum gates and quantum measurement. Highlights in quantum photonics include the demonstration of a photonic crystal fibre-based pair-photon source, distance records in free space key-exchange experiments (2002 and 2007), the first experimental demonstration of an entangling quantum gate and quantum optical phase measurement with greater precision than classical techniques.
Staff
Prof John Rarity, Dr Jeremy O’Brien (joint with Physics) Dr Martin Cryan.
Current Projects
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Photonic crystal fibre sources of photon pairs
- All fibre pair sources
- All fibre quantum gates
- Entangled states
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Study of microcavities based on III-V semiconductors for single photon sources and quantum information
- Efficient single photon sources
- Strong coupling in semiconductor microcavities
- Exchanging information between spin and photons
- Diamond based single photon sources and quantum computing
- Developing integrated optics quantum gates
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Developing 3-D photonic crystal:
- 3-D defect microcavities
- control of spontaneous emission
