Level dependence of the self-energy correction to the Hartree-Fock single-particle energies in 208Pb

1984 ◽  
Vol 140 (3-4) ◽  
pp. 163-166 ◽  
Author(s):  
P.F. Bortignon ◽  
R.A. Broglia ◽  
C.H. Dasso ◽  
C. Mahaux
Keyword(s):  
Single Particle ◽  
The Self ◽  
Energy Correction ◽  
Hartree Fock ◽  
Self Energy

Energy Dependence of the Single-Particle Self-Energy Correction for Ge and Si

1986 ◽  
Vol 56 (11) ◽  
pp. 1187-1190 ◽  
Author(s):  
W. B. Jackson ◽  
John E. Northrup ◽  
J. W. Allen ◽  
R. I. Johnson
Keyword(s):  
Energy Dependence ◽  
Single Particle ◽  
Energy Correction ◽  
Self Energy

scholarly journals ON THE NONRELATIVISTIC LIMIT OF THE φ4 THEORY IN 2+1 DIMENSIONS

1996 ◽  
Vol 11 (36) ◽  
pp. 2825-2836 ◽  
Author(s):  
M. GOMES ◽  
J.M.C. MALBOUISSON ◽  
A.J. DA SILVA
Keyword(s):  
Quantum Theory ◽  
Scalar Field ◽  
Scattering Amplitude ◽  
Nonrelativistic Limit ◽  
Low Energy ◽  
The Self ◽  
Energy Correction ◽  
Real Scalar ◽  
Self Energy

We study the nonrelativistic limit of the quantum theory of a real scalar field with quartic self-interaction. The two-body scattering amplitude is written in such way as to separate the contributions of high and low energy intermediary states. From this result and the two-loop computation of the self-energy correction, we determine an effective nonrelativistic action.

scholarly journals CORRELATIONS AND THE RELATIVISTIC STRUCTURE OF THE NUCLEON SELF-ENERGY

1999 ◽  
Vol 08 (02) ◽  
pp. 179-196 ◽  
Author(s):  
H. MÜTHER ◽  
S. ULRYCH ◽  
H. TOKI
Keyword(s):  
Nuclear Matter ◽  
Particle Energy ◽  
The Self ◽  
Momentum Dependence ◽  
Hartree Fock ◽  
Self Energy ◽  
The Matrix ◽  
Lorentz Scalar ◽  
Bonn Potential ◽  
Non Locality

A key point of Dirac-Brueckner-Hartree-Fock calculations for nuclear matter is to decompose the self-energy of the nucleons into Lorentz scalar and vector components. A new method is introduced for this decomposition. It is based on the dependence of the single-particle energy on the small components in the Dirac spinors used to calculate the matrix elements of the underlying NN interaction. The resulting Dirac components of the self-energy depend on the momentum of the nucleons. At densities around and below the nuclear matter saturation density this momentum dependence is dominated by the non-locality of the Brueckner G matrix. At higher densities these correlation effects are suppressed and the momentum dependence due to the Fock exchange terms is getting more important. Differences between symmetric nuclear matter and neutron matter are discussed. Various versions of the Bonn potential are considered.

scholarly journals Evaluation of the self-energy correction to thegfactor ofSstates in H-like ions

2004 ◽  
Vol 69 (5) ◽  
Author(s):  
V. A. Yerokhin ◽  
P. Indelicato ◽  
V. M. Shabaev
Keyword(s):  
The Self ◽  
Energy Correction ◽  
Self Energy

Resonant Valence-Band Satellites at the Ni-3p Edge of Ni3Al, Ni3Ga and Ni3In

1998 ◽  
Vol 12 (26) ◽  
pp. 2757-2767 ◽  
Author(s):  
Li-Shing Hsu ◽  
K.-L. Tsang ◽  
S.-C. Chung
Keyword(s):  
Synchrotron Radiation ◽  
Intermetallic Compounds ◽  
Valence Band ◽  
Configuration Interaction ◽  
The Self ◽  
Excitation Threshold ◽  
Coulomb Interactions ◽  
Core Excitation ◽  
Energy Correction ◽  
Self Energy

Valence-band photoemission sspectra of Ni 3 Al , Ni 3 Ga and Ni 3 In were measured with synchrotron radiation at photon energies around the Ni-3p core excitation threshold. The valence-band satellites are resonantly enhanced. The number of holes per Ni atom in the Ni-d band for Ni 3 Al , Ni 3 Ga and Ni 3 In is estimated to be 0.37, 0.30 and 0.34, respectively. The self-energy correction due to the configuration interaction is 0.72, 0.71 and 0.72 eV, respectively, for Ni 3 Al , Ni 3 Ga and Ni 3 In . The Fano parameters and the effective Coulomb interactions between two 3D holes for these intermetallic compounds are determined.

scholarly journals SELF-CONSISTENT TREATMENT OF THE SELF-ENERGY IN NUCLEAR MATTER

2005 ◽  
Vol 14 (02) ◽  
pp. 279-295 ◽  
Author(s):  
KH. GAD
Keyword(s):  
Nuclear Matter ◽  
The Self ◽  
Particle Spectrum ◽  
Spectral Functions ◽  
Hartree Fock ◽  
Self Energy ◽  
Continuous Choice ◽  
Self Consistent ◽  
Particle Propagation ◽  
Consistent Treatment

The influence of hole–hole propagation in addition to the conventional particle–particle propagation on the energy per nucleon and the momentum distribution is investigated. The results are compared to the Brueckner–Hartree–Fock (BHF) calculations with a continuous choice and a conventional choice for the single-particle spectrum. Also, the structure of nucleon self-energy in nuclear matter is evaluated. All the off-shell self-energies are calculated self-consistently. Using the self-consistent self-energy, the hole and particle self-consistent spectral functions including the particle–particle and hole–hole ladder contributions in nuclear matter are calculated using realistic NN interactions. We found that the hole–hole ladder brought about non-negligible contributions to the nuclear matter binding energy per nucleon.

HOLE QUASIPARTICLE DYNAMICS IN THE DOPED 2D QUANTUM ANTIFERROMAGNET

1995 ◽  
Vol 09 (26n27) ◽  
pp. 1719-1727 ◽  
Author(s):  
A.L. KUZEMSKY ◽  
D. MARVAKOV
Keyword(s):  
The Self ◽  
Strongly Correlated ◽  
Strongly Correlated Electron ◽  
Correlated Electron Systems ◽  
True Nature ◽  
Hartree Fock ◽  
Self Energy ◽  
Correlated Electron ◽  
The One ◽  
Quantum Antiferromagnet

The spectrum of hole quasiparticles and the role of magnetic correlations are investigated in the self-consistent Irreducible Green Functions formalism motivated from Strongly Correlated Electron systems in the framework of spin-fermion model. It was clearly pointed out on the self-energy level, beyond Hartree-Fock approximation, how the one-and two-magnon processes define the true nature of carriers in HTSC.

MICROSCOPIC CALCULATIONS IN NEUTRON MATTER

2005 ◽  
Vol 14 (05) ◽  
pp. 763-774 ◽  
Author(s):  
Kh. GAD
Keyword(s):  
Neutron Matter ◽  
The Self ◽  
Zero Temperature ◽  
Hartree Fock ◽  
Self Energy ◽  
Self Consistent ◽  
Pure Neutron Matter ◽  
Negligible Contribution

The properties of neutron matter are investigated in the framework of the extended Brueckner–Hartree–Fock approximation at zero temperature. Self-consistent calculations using different realistic interactions are reported for pure neutron matter. In this contribution, all the self-energies are calculated self-consistently. Using the self-energy, k-mass is evaluated using realistic NN interactions. Furthermore, the effect of hole–hole contributions is examined. We found that the hole–hole ladder brought about a non-negligible contribution.

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