Correlation Energy Expressions from the Adiabatic-Connection Fluctuation-Dissipation Theorem Approach

被引:117
作者
Angyan, Janos G. [1 ,2 ]
Liu, Ru-Fen [1 ,2 ]
Toulouse, Julien [3 ,4 ]
Jansen, Georg [5 ]
机构
[1] Nancy Univ, Inst Jean Barriol, CRM2, F-54506 Vandoeuvre Les Nancy, France
[2] CNRS, F-54506 Vandoeuvre Les Nancy, France
[3] Univ Paris 06, Chim Theor Lab, F-75005 Paris, France
[4] CNRS, F-75005 Paris, France
[5] Univ Duisburg Essen, Fak Chem, D-45117 Essen, Germany
关键词
RANDOM-PHASE-APPROXIMATION; GENERALIZED GRADIENT APPROXIMATION; EXCHANGE-CORRELATION ENERGY; STATE CORRELATION ENERGIES; BASIS-SET CONVERGENCE; SURFACE;
D O I
10.1021/ct200501r
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We explore several random phase approximation (RPA) correlation energy variants within the adiabatic-connection fluctuation dissipation theorem approach. These variants differ in the way the exchange interactions are treated. One of these variants, named dRPA-II, is original to this work and closely resembles the second-order screened exchange (SOSEX) method. We discuss and clarify the connections among different RPA formulations. We derive the spin-adapted forms of all the variants for closed-shell systems and test them on a few atomic and molecular systems with and without range separation of the electron electron interaction.
引用
收藏
页码:3116 / 3130
页数:15
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