A minimalistic approach to static and dynamic electron correlations: Amending generalized valence bond method with extended random phase approximation correlation correction

2016 ◽  
Vol 144 (24) ◽  
pp. 244111 ◽  
Author(s):  
Koushik Chatterjee ◽  
Ewa Pastorczak ◽  
Konrad Jawulski ◽  
Katarzyna Pernal
Keyword(s):  
Random Phase Approximation ◽  
Random Phase ◽  
Valence Bond ◽  
Phase Approximation ◽  
Electron Correlations ◽  
Generalized Valence Bond ◽  
Correlation Correction ◽  
Bond Method

COMPTON SCATTERING CROSS SECTIONS FOR HEAVY ATOMS WITH ACCOUNT OF MANY-ELECTRON CORRELATIONS

2002 ◽  
Vol 09 (02) ◽  
pp. 1155-1160 ◽  
Author(s):  
M. YA. AMUSIA ◽  
L. V. CHERNYSHEVA ◽  
Z. FELFLI ◽  
A. Z. MSEZANE
Keyword(s):  
Cross Sections ◽  
Random Phase Approximation ◽  
Random Phase ◽  
Phase Approximation ◽  
Electron Correlations ◽  
Hartree Fock ◽  
Heavy Atoms ◽  
The One ◽  
Scattering Cross Sections ◽  
Electron Effects

Compton ionization of krypton and xenon outer and intermediate subshells is investigated. Results are presented covering the energy transferred to the atoms from their ionization thresholds up to 30 Ry and momentum transferred up to 4 a.u. Calculations are performed in the one-electron Hartree–Fock approximation and with many-electron effects taken into account in the random phase approximation with exchange. It is demonstrated that many-electron correlations play an important role not only in dipole but also in monopole and quadrupole transitions, significantly modifying the cross sections as well as leading to new maxima and minima.

Interpretation of Preferential Adsorption Using Random Phase Approximation Theory

1995 ◽  
Vol 60 (10) ◽  
pp. 1641-1652 ◽  
Author(s):  
Henri C. Benoît ◽  
Claude Strazielle
Keyword(s):  
Approximation Theory ◽  
Random Phase Approximation ◽  
Virial Coefficient ◽  
Random Phase ◽  
Second Virial Coefficient ◽  
Solvent Mixture ◽  
Gyration Radius ◽  
Thermodynamic Quantities ◽  
Phase Approximation ◽  
Preferential Adsorption

It has been shown that in light scattering experiments with polymers replacement of a solvent by a solvent mixture causes problems due to preferential adsorption of one of the solvents. The present paper extends this theory to be applicable to any angle of observation and any concentration by using the random phase approximation theory proposed by de Gennes. The corresponding formulas provide expressions for molecular weight, gyration radius, and the second virial coefficient, which enables measurements of these quantities provided enough information on molecular and thermodynamic quantities is available.

Neutrino reactions onC12by the quasiparticle random-phase approximation (QRPA)

2010 ◽  
Vol 81 (2) ◽  
Author(s):  
Myung-Ki Cheoun ◽  
Eunja Ha ◽  
Su Youn Lee ◽  
K. S. Kim ◽  
W. Y. So ◽  
...  
Keyword(s):  
Random Phase Approximation ◽  
Random Phase ◽  
Phase Approximation ◽  
Quasiparticle Random Phase Approximation

Communication: Analytic gradients in the random-phase approximation

2013 ◽  
Vol 139 (8) ◽  
pp. 081101 ◽  
Author(s):  
Johannes Rekkedal ◽  
Sonia Coriani ◽  
Maria Francesca Iozzi ◽  
Andrew M. Teale ◽  
Trygve Helgaker ◽  
...  
Keyword(s):  
Random Phase Approximation ◽  
Random Phase ◽  
Phase Approximation
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