Quantum Systems in Chemistry and Physics

Preface. 1. Density Matrices and Density Functionals. 3-Body Correlation Effects in Third Order Reduced Density Matrices; C. Valdemoro, et al. 2. Electron Correlation Effects. Ab Initio Summation Over States/CI Singles for Static and Dynamic First Hyperpolarizabilities of Small Molecules; M. Spassova, et al. Comparing (SC)2CAS-SDCI and Externally Corrected CCSD Methods; G. Peris, J.P. Malrieu. The Size-Consistent Self-Consistent SDCI Method for Excited States and Ionization Potentials; J. Pitarch-Ruiz, et al. Influence of Electron Correlation on the Electronic Structure of Superconducting Y-Ceramics; I.G. Kaplan, et al. 3. Relativistic Formulations. Perspectives in Relativistic Thomas-Fermi Calculations for Atomic Systems; I. Porras, A. Moya. Expectation Values for Ground State Atoms from a Modified Thomas-Fermi-Diract Approach; A. Moya, I. Porras. Relativisitic oscillator strengths for excited-state transitions in halogen atoms. Regularities; C. Lavin, et al. Extension of the Relativistic Quantum Defect Orbital Method to the Tratment of Many-valence Electron Atoms. Atomic Transition in Ar II; I. Martíin, et al. 4. Valence Theory. 5. Nuclear Motions. The Effect of the Pseudopotential on the Torsional Energy Levels of Hydrogen Peroxide and Deuterium Peroxide; M.L. Senent, Y.G. Smeyers. 6. Response Theory. Duality in Two-ways Interferometers: The Symmetric Quanton-Detecton System; J. Martínez-Linares, D.A. Harmin. Atomic Resonances in External Field; R. González-Ferez, W. Scheweizer. 7. Condensed Matter. Diffusion Monte Carlo Calculations of Quasibound States of Rare Gas-halogen Clusters: a Diabatic Approach; G.García-Rizo, et al. 8. Reactive Collisions and Chemical reactions. Electro-nuclear Quantum Mechanics Beyond theBorn-Oppenheimer Approximation. Towards a Quantum Electronic Theory of Chemical Reaction Mechanisms. 9. Computational Chemistry and Physics. N-O and P-O Bond Nature in Hypervalent Compounds. Is Bader Analisys Basis Set and Geometry Independent? J.A. Dobado, et al. A Theoretical Study of the Radical Addition to the Xylenes; V.-H. Uc, et al. Theoretical Study of the Proton Affinities of Some Substituted Derivatives of Histamine and Homologous Compounds. Structure-Activity Relationships.