Career
In his career he has made numerous contributions to Nuclear magnetic resonance, quantum optics and conceptual physics including the nature of time. His h-index is at least 38. He is a fellow of the Australian Academy of Science and a Corresponding Fellow of the Royal Society of Edinburgh.
He is best known for the Pegg-Barnett phase formalism that provides a quantum mechanical description of the phase of light (Physical
Review A volume.39, 1665-1675 (1989)), for the invention of the DEPT sequence for nuclear magnetic resonance (J. Chemistry Physical volume.77, 2745-2752 (1982)) and for the invention of the quantum scissors device (Physical
Review Lett. volume.81, 1604-1606 (1998)).
