ct9b01238_si_001.pdf (176.96 kB)
Compact Real-Space Representation of Excited States Using Frequency-Dependent Explicitly Correlated Electron–Hole Interaction Kernel
journal contribution
posted on 2020-08-07, 13:06 authored by Peter
F. McLaughlin, Arindam ChakrabortyWe
present the frequency-dependent geminal-screened electron–hole
interaction kernel (FD-GSIK) method for describing electron–hole
correlation in electronically excited many-electron systems. The FD-GSIK
is a parameter-free, first-principles method derived from excited-state
wave function that was both frequency-dependent and r12-explicitly
correlated. The FD-GSIK avoids using unoccupied orbitals for kernel
construction by performing an infinite-order summation of particle-hole
excitation and representing it as a compact real-space operator. It
bypasses the computationally demanding steps of evaluation, storage,
and transformation of atomic-orbital integrals by directly evaluating
molecular orbital integrals in real space using the stratified Monte
Carlo method. We demonstrate and discuss the advantages of this method
by presenting excitation and electron–hole binding energies
of large nanoparticles including Pb140S140,
Pb140Se140, Cd144Se144, and Cd72S72.
History
Usage metrics
Categories
Keywords
atomic-orbital integralsfrequency-dependentPb 140 Se 140Cd 144 Se 144Monte Carlo methodinfinite-order summationCd 72 S 72real-space operatorFD-GSIKfirst-principles methodPb 140 S 140Compact Real-Space Representationmany-electron systemsExcited Statesexcited-state wave functionkernel constructionr 12-explicitlyparticle-hole excitation
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC