Condensed Matter Theories

Formal Methods.- Parquet Theory: the Diagrams.- Generalized Self-Consistent Field Equations for Multiple Pairs of Fermions.- The Anharmonic Oscillator Revisited.- Boson, Symplectic and Other Replicas for Simple Hamiltonians.- Towards a Coupled Cluster Gauge-Field Approach to Quantum Hydrodynamics.- On the Existence and Realization of Size-Extensive Effective Hamiltonian Theories for General Model Spaces.- Open-Shell Coupled-Cluster Studies of Atomic and Molecular Systems.- Variational Approximation to the Non-Hermitian Dyson Boson Hamiltonian.- On the Convergence of Cluster Expansions in Finite Nuclei.- Semiclassical Molecular Dynamics of Wavepackets in One-Dimensional Phase Space.- Quantum Fluids.- Theory of Neutron Scattering Experiments on Momentum Distributions in Quantum Fluids.- Excitations at High Momentum in Quantum Fluids.- Dynamic Structure Function of the Quantum Boson Fluid in the Jastrow Theory.- Lennard-Jones Boson Matter in the Thermodynamic Perturbation Scheme.- Semiquantum Gases: Quantum Collective Phenomena in Classical Temperature Range.- Electronic Systems and Solids.- Some Thoughts on the New High TC Superconductors.- Nature of Gigantic Resistance Fluctuations in Metal-Oxide-Semiconductor Wires.- The Formulation of Density Functional Theory.- The Energy Density Functional Theory: Present Status-Reflections.- Structures of Small Metal Clusters.- Generalized Gradient Approximations for Exchange and Correlation: Numerical Tests and Prospects.- Nuclear and High-Energy Many-Body Problems.- Effective Interactions and Elementary Excitations in Nuclear Matter.- The Particle-Hole Interaction in Finite Nuclei.- Role of Virtual Double Delta Components in Nuclei.- Characteristics of Pion-Condensed Neutron Stars - Pulsar Glitch and Supernova 1987A.- NÑAnnihilation in Terms of Quarks.- QCD as a Many-Body Problem and Aspects of Confinement.- Nucleon Mean-Free Path in Nuclear Matter.- Saturation in Nuclear Matter: A New Perspective.- Dynamics of Nonlinear