My work applies the principles of quantum mechanics and statistical mechanics to systems of a large number of strongly interacting particles, to understand and describe macroscopic quantum phenomena such as magnetism and superconductivity. I also work on mathematical models which exhibit phase transitions, a striking and ubiquitous phenomenon which involves correlations between particles over macroscopic volumes.

These studies are largely based on lattice models and use a variety of analytic and numerical techniques requiring the use of supercomputers. I am also interested in other aspects of the theory of condensed matter, and theoretical physics more generally.

• J. Oitmaa, C.J. Hamer & W. Zheng, 'Series Expansion Methods for Strongly Interacting Lattice Models', (Cambridge University Press, 2006)
• J. Oitmaa & C.J. Hamer, Ground-state properties and one-particle spectra for a spin-1 Heisenberg antiferromagnet from series expansions Phys. Rev. B77, 224435 (1-10) (2008)
• J. Oitmaa, W. Zheng & D. Tompsett, Hard-core bosons on the triangular lattice at zero temperature: a series expansion study, Phys. Rev. B73, 172401 (1-4) (2006)
• W. Zheng, J. Oitmaa & C.J. Hamer, Series studies of the spin-1/2 Heisenberg antiferromagnet at T=0 : Magnon dispersion and structure factors, Phys. Rev. B71, 184440(1-10) (2005)
• J. Oitmaa & O.P. Sushkov, Two-dimensional randomly frustrated spin-1/2 Heisenberg model, Phys. Rev. Lett. 87, 167206 (1-4) (2001)

School of Physics
The University of New South Wales
SYDNEY 2052
Australia

j.oitmaa@unsw.edu.au

61 2 9385 4596

61 2 9385 6060