Process Realizability

We develop a notion of realizability for Classical Linear Logic based on a concurrent process calculus.Comment: Appeared in Foundations of Secure Computation: Proceedings of the 1999 Marktoberdorf Summer School, F. L. Bauer and R. Steinbruggen, eds. (IOS Press) 2000, 167-18

An Algebraic Characterisation of Concurrent Composition

We give an algebraic characterization of a form of synchronized parallel composition allowing for true concurrency, using ideas based on Peter Landin's "Program-Machine Symmetric Automata Theory".Comment: This is an old technical report from 1981. I submitted it to a special issue of HOSC in honour of Peter Landin, as explained in the Prelude, added in 2008. However, at an advanced stage, the handling editor became unresponsive, and the paper was never published. I am making it available via the arXiv for the same reasons given in the Prelud

High-Level Methods for Quantum Computation and Information

A research programme is set out for developing the use of high-level methods for quantum computation and information, based on the categorical formulation of quantum mechanics introduced by the author and Bob Coecke.Comment: 5 page