Journal ArticleDOI
The Random Phase Approximation and Its Implications
TLDR
In this paper, the consistency of the random phase approximation and its generalizations are reviewed and a special attention is given to the ground state correlation energy problem as reflected in the calculation of chemical bond energies.Abstract:
Recent results concerning the consistency of the random phase approximation and its generalizations are reviewed. Particular attention is given to the ground state correlation energy problem as reflected in the calculation of chemical bond energies.read more
Citations
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Journal ArticleDOI
Density Matrix Analysis and Simulation of Electronic Excitations in Conjugated and Aggregated Molecules
Sergei Tretiak,Shaul Mukamel +1 more
TL;DR: Conjugated polymers are primary candidates for new organic optical materials with large nonlinear polarizabilities and potential applications include electroluminescence, light emitting diodes, ultrafast switches, photodetectors, biosensors, and optical limiting materials.
Journal ArticleDOI
Electron-vibrational dynamics of photoexcited polyfluorenes.
Ignacio Franco,Sergei Tretiak +1 more
TL;DR: A theoretical investigation of the dynamics and relaxation of photoexcited states in conjugated polyfluorenes, which are promising materials for display applications and it is demonstrated that dimerization such as spiro-linking does not affect the emission properties of molecules.
Journal ArticleDOI
Excited states via the AGP polarization propagator. I. Application to Li2
TL;DR: In this paper, an approximation to the polarization propagator using an optimized antisymmetrized geminal power (AGP) wave function as a reference state is discussed as an application, potential energy curves and spectroscopic constants for some of the low-lying electronic states in Li2 are given Transition moments and radiative lifetimes for the experimentally observed B 1Πu-X 1Σ+g and A
Book ChapterDOI
Introductory Polarization Propagator Theory
TL;DR: An overview of the current polarization proragator methods is presented in this article, which concentrates on the common properties of the polarization propagator approaches rather than describing the details of individual methods.
Journal ArticleDOI
Ordinary field-theoretic methods for self-consistent wave functions which describe bond formation and dissociation. II. Commutative coupling case
TL;DR: In this paper, Hartree-Bogoliubov-Valatin (HBV) theory is implemented with Lipkin Hamiltonians to obtain self-consistent BCS wave functions which describe bond formation and dissociation.
References
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Journal ArticleDOI
Electron correlations in narrow energy bands
TL;DR: In this paper, the Hartree-Fock approximation of the correlation problem for the d-and f-bands was applied to a simple, approximate model for the interaction of electrons in narrow energy bands.
Journal ArticleDOI
Absence of Mott Transition in an Exact Solution of the Short-Range, One-Band Model in One Dimension
Elliott H. Lieb,F. Y. Wu +1 more
TL;DR: In this paper, the short-range, one-band model for electron correlations in a narrow energy band is solved exactly in the one-dimensional case, and the ground-state energy, wave function, and chemical potentials are obtained, and it is found that the ground state exhibits no conductor-insulator transition as the correlation strength is increased.
Journal ArticleDOI
Nuclear constitution and the interpretation of fission phenomena
Journal ArticleDOI
A Collective Description of-Electron Interactions: III. Coulomb Interactions in a Degenerate Electron Gas
TL;DR: In this article, the behavior of the electrons in a dense electron gas is analyzed quantum-mechanically by a series of canonical transformations, and the results are related to the classical density fluctuation approach and Tomonaga's one-dimensional treatment of the degenerate Fermi gas.
Journal ArticleDOI
A Collective Description of Electron Interactions: II. Collective vs Individual Particle Aspects of the Interactions
TL;DR: In this article, the behavior of the electrons in a dense electron gas is analyzed in terms of their density fluctuations, which are then split into two components, one component associated with the organized oscillation of the system as a whole, the so-called "plasma" oscillation, and the other component representing the random thermal motion of the individual electrons.
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