scholarly journals Progress in many-body theory with the equation of motion method: Time-dependent density matrix meets self-consistent RPA and applications to solvable models

2016 ◽  
Vol 93 (16) ◽  
Author(s):  
Peter Schuck ◽  
Mitsuru Tohyama
Keyword(s):  
Density Matrix ◽  
Equation Of Motion ◽  
Time Dependent ◽  
Solvable Models ◽  
Many Body ◽  
Many Body Theory ◽  
Self Consistent ◽  
Body Theory ◽  
Motion Method ◽  
Dependent Density

scholarly journals Dimension-dependent band alignment and excitonic effects in graphitic carbon nitride: a many-body perturbation and time-dependent density functional theory study

RSC Advances ◽  
2017 ◽  
Vol 7 (71) ◽  
pp. 44997-45002 ◽  
Author(s):  
W. F. Espinosa-García ◽  
J. M. Osorio-Guillén ◽  
C. Moyses Araujo
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Band Alignment ◽  
Time Dependent ◽  
Many Body ◽  
Functional Theory ◽  
Many Body Theory ◽  
Excitonic Effects ◽  
Body Theory ◽  
Dependent Density

First-principles many-body theory and time-dependent density functional theory were used to study the dimension effects on the band alignment and optical properties of s-triazine and graphitic C3N4.

EXCHANGE–CORRELATION KERNEL IN TIME-DEPENDENT DENSITY FUNCTIONAL THEORY DERIVED FROM MANY-BODY THEORY

2004 ◽  
Vol 18 (07) ◽  
pp. 1055-1067 ◽  
Author(s):  
K. KARLSSON ◽  
F. ARYASETIAWAN
Keyword(s):  
Density Functional Theory ◽  
Optical Absorption ◽  
Density Functional ◽  
Time Dependent ◽  
Many Body ◽  
Functional Theory ◽  
Correlation Kernel ◽  
Exchange Correlation ◽  
Many Body Theory ◽  
Dependent Density

We derive a simplified Bethe–Salpeter equation for calculating optical absorption based on the assumption of a local electron–hole interaction. The original four-point equation for the kernel is reduced to a two-point one. A connection to the exchange–correlation kernel in time-dependent density functional theory can be established. The resulting fxc is found to be -W/2 where W contains only the short-range (local) part of the Coulomb screened interaction. This simple approximation was successfully applied to optical absorption spectra of some excitonic crystals, reproducing not only the continuum excitons but also the bound ones.

scholarly journals Self-consistent approximations to non-equilibrium many-body theory

1999 ◽  
Vol 657 (4) ◽  
pp. 413-445 ◽  
Author(s):  
Yu.B. Ivanov ◽  
J. Knoll ◽  
D.N. Voskresensky
Keyword(s):  
Many Body ◽  
Many Body Theory ◽  
Self Consistent ◽  
Consistent Approximations ◽  
Body Theory ◽  
Non Equilibrium

Self-consistent second-order screening in many-body theory

1994 ◽  
Vol 51 (6) ◽  
pp. 389-396
Author(s):  
V. E. Van doren ◽  
P. E. Van camp ◽  
G. Straub
Keyword(s):  
Second Order ◽  
Many Body ◽  
Many Body Theory ◽  
Self Consistent ◽  
Body Theory

Self‐consistent many‐body theory of π‐electron systems. II. Self‐energy effects

1979 ◽  
Vol 70 (9) ◽  
pp. 4086-4090 ◽  
Author(s):  
Marcello Baldo ◽  
Renato Pucci ◽  
Pasquale Tomasello
Keyword(s):  
Electron Systems ◽  
Many Body ◽  
Self Energy ◽  
Many Body Theory ◽  
Self Consistent ◽  
Body Theory
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