Development of techniques of microscopic quantum many-body theory (especially the coupled cluster method), and their applications to
the structure of light and intermediate-mass atomic nuclei
lattice and continuum quantum field theories
spin-lattice systems in quantum magnetism
strongly correlated electronic systems
systems in quantum optics, quantum electronics and solid-state optoelectronics
strongly correlated fermion/boson systems
quantum coherence and quantum information theory
generalised pure coherent states
new classes of mixed coherent states (including thermal coherent states)
noisy bases in Hilbert space
coherence/decoherence phenomena
generalised thermofield dynamics
extended quantum phase space methods
