Theory of strongly correlated electron systems, including pairing correlations in high-temperature superconductors, Fermi Liquid vs. non-Fermi Liquid metals, local Fermi liquids and the metal-insulator transition.
M. Randeria, J.R. Engelbrecht, and N. Trivedi, "Search for Deviations from Fermi Liquid Behaviour in 2D Repulsive and Attractive Hubbard Models" in The Physics and Mathematical Physics of the Hubbard Model, ed. D. Baeriswyl et al. (Plenum, 1994).
J.R. Engelbrecht, M. Randeria, C.A.R. Sa de Melo, "Short Coherence Length Superconductors: intermediate Regime Between BCS and Bosons in Strongly Correlated Electronic Materials," The Los Alamos Symposium, ed. K. Bedell et al. (Addison Wesley, 1994).
M. Randeria, C.A.R. Sa de Melo, J.R. Engelbrecht, "Crossover from BCS to Bose Superconductivity – a Functional Integral Approach," Physica B 194(2), 1409 (1994).
C.A.R. Sa de Melo, M. Randeria, J.R. Engelbrecht, "Crossover from BCS to Bose Superconductivity– Transition Temparetaure and Time-Dependent Ginzburg-Landau Theory," Phys. Rev. Lett. 71(19), 3202 (1993).
J.R. Engelbrecht, M. Randeria, "Low-Density Repulsive Fermi Gas in 2 Dimensions – Bound-Pair Excitations and Fermi-Liquid Behavior," Phys. Rev. B 45 (21), 12419 (1992).
J.R. Engelbrecht, M. Randeria, L. Zhang, "Landau f Function for the Dilute Fermi Gas in 2 Dimensions," Phys. Rev. B45 (17), 10135 (1992).
J.R. Engelbrecht, M. Randeria, "Is There a Breakdown of Fermi-Liquid Behavior in the 2-Dimensional Fermi Gas," Phys. Rev. Lett.66 (24), 3225 (1991).
C.A. Engelbrecht, J.R. Engelbrecht, "Fermi Gas Descriptions of Nuclear-Level Densities," Ann. Phys.-New York 207 (1), 1 (1991).
J.R. Engelbrecht, M. Randeria, "New Collective Mode and Corrections to Fermi-Liquid Theory in 2 Dimensions," Phys. Rev. Lett.65 (8), 1032 (1990).
J.R. Engelbrecht, P. Kritzinger , H. Rudin, "Predicting Protocol Performance from a Meta-Implementation," Proc. 5th Intl. Workshop on Protocol Specification, Testing and Verification, Toulouse-Moissac, North Holland (1985).
J.R. Engelbrecht, C.A. Engelbrecht, "'Toestandvergelykings by Uiterste Toestande' [Equations of State under Extreme Conditions]," Proc. 22nd Annual Seminar on Theoretical Physics, Durban, ed. H.B. Geyer, Organisation of Theoretical Physics (South Africa), p. 223 (1987).