In this project we develop analytical and computational methods for the analysis of quantum effects associated with the semi-classical formation of spatial structures in nonlinear optics. When quantum fluctuations are included in the treatment, noisy images are obtained. Encoding of information within the quantum correlations, rather than the intensity, of the field has potential application in quantum optical processing. Special emphasis is put on the measurements of quantum spatio-temporal correlations. In particular, we devise methods for the interpretation of quantum measurements of optical fields in space and time.
Optical sprinklers rotate in time and can be used for the trapping and distribution of cold atoms.
Slow moving atoms remain trapped at the centre of the beam while hot atoms escape through the sprinkler s arms. The project focuses on the characterisation of the trapping properties of optical sprinklers and their possible application in experiments in atomic physics. Quantum Information Theory Quantum mechanics holds out the prospect of a radically new approach to the way we process and communicate information. Quantum cryptography has already demonstrated the practical possibility of distributing secret information with absolute security and quantum computers provide the prospect of solving problems that are too large for classical computers. This project will address key issues at the foundations of quantum information theory such as how to discriminate between different quantum states, what is the best measurement strategy in order to extract the most information and how can these ideas be implemented in the laboratory.