Zobrazeno 1 - 10
of 425
pro vyhledávání: '"Neck, D"'
Autor:
Johnson, P. A., Fecteau, C. -É., Berthiaume, F., Cloutier, S., Carrier, L., Gratton, M., Bultinck, P., De Baerdemacker, S., Van Neck, D., Limacher, P., Ayers, P. W.
Ground state eigenvectors of the reduced Bardeen-Cooper-Schrieffer Hamiltonian are employed as a wavefunction ansatz to model strong electron correlation in quantum chemistry. This wavefunction is a product of weakly-interacting pairs of electrons. W
Externí odkaz:
http://arxiv.org/abs/2007.10705
Publikováno v:
Comput. Phys. Commun., 182(6):1235-1244, 2011
The quantum many-body problem can be rephrased as a variational determination of the two-body reduced density matrix, subject to a set of N-representability constraints. The mathematical problem has the form of a semidefinite program. We adapt a stan
Externí odkaz:
http://arxiv.org/abs/1012.2059
Publikováno v:
Phys.Rev.C82:054306,2010
Present applications of the dispersive-optical-model analysis are restricted by the use of a local but energy-dependent version of the generalized Hartree-Fock potential. This restriction is lifted by the introduction of a corresponding nonlocal pote
Externí odkaz:
http://arxiv.org/abs/1010.1464
The accuracy of the Faddeev random phase approximation (FRPA) method is tested by calculating the total and ionization energies of a set of light atoms up to Ar. Comparisons are made with the results of coupled-cluster singles and doubles (CCSD), thi
Externí odkaz:
http://arxiv.org/abs/1004.2607
Autor:
Barbieri, C., Van Neck, D.
Publikováno v:
AIP Conf.Proc.1120:104-108,2009
The Faddeev random phase approximation (FRPA) method is applied to calculate the ground state and ionization energies of simple atoms. First ionization energies agree with the experiment at the level of ~10 mH or less. Calculations with similar accur
Externí odkaz:
http://arxiv.org/abs/0901.1735
The spectral function of the closed-shell Neon atom is computed by expanding the electron self-energy through a set of Faddeev equations. This method describes the coupling of single-particle degrees of freedom with correlated two-electron, two-hole,
Externí odkaz:
http://arxiv.org/abs/0704.1542
We propose a framework to construct the ground-state energy and density matrix of an N-electron system by solving selfconsistently a set of single-particle equations. The method can be viewed as a non-trivial extension of the Kohn-Sham scheme (which
Externí odkaz:
http://arxiv.org/abs/physics/0609037
Publikováno v:
Phys.Rev. C68 (2003) 064307
The symmetry energy for nuclear matter and its relation to the neutron skin in finite nuclei is discussed. The symmetry energy as a function of density obtained in a self-consistent Green function approach is presented and compared to the results of
Externí odkaz:
http://arxiv.org/abs/nucl-th/0312031
The hadronic equation of state for a neutron star is discussed with a particular emphasis on the symmetry energy. The results of several microscopic approaches are compared and also a new calculation in terms of the self-consistent Green function met
Externí odkaz:
http://arxiv.org/abs/nucl-th/0312012
Publikováno v:
Phys.Rev.Lett. 90 (2003) 152501
A fully self-consistent treatment of short-range correlations in nuclear matter is presented. Different implementations of the determination of the nucleon spectral functions for different interactions are shown to be consistent with each other. The
Externí odkaz:
http://arxiv.org/abs/nucl-th/0303047