Time-Dependent Electronic Populations in Fragment-Based Time-Dependent Density Functional Theory
نویسندگان
چکیده
منابع مشابه
Time-Dependent Electronic Populations in Fragment-Based Time-Dependent Density Functional Theory.
Conceiving a molecule as being composed of smaller molecular fragments, or subunits, is one of the pillars of the chemical and physical sciences and leads to productive methods in quantum chemistry. Using a fragmentation scheme, efficient algorithms can be proposed to address problems in the description of chemical bond formation and breaking. We present a formally exact time-dependent density ...
متن کاملTime-dependent density functional theory.
Time-dependent density functional theory (TDDFT) can be viewed as an exact reformulation of time-dependent quantum mechanics, where the fundamental variable is no longer the many-body wave function but the density. This time-dependent density is determined by solving an auxiliary set of noninteracting Schrodinger equations, the Kohn-Sham equations. The nontrivial part of the many-body interacti...
متن کاملTime-Dependent Density Functional Theory
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متن کاملCorrelation in time-dependent density-functional theory
The exact time-dependent correlation energy in time-dependent density-functional theory is shown to sometimes become positive, which is impossible with most present TDDFT approximations. Both the correlation potential and energy can be strongly nonlocal in time. A new inequality is derived for the time-dependent exchange-correlation energy. The correlation energy appears to scale to a constant ...
متن کاملMemory in time-dependent density functional theory.
Exact time-dependent density functionals remember both the entire history of the density and the initial wave function. We show that the two effects are intimately related, and all history dependence can be written as initial-state dependence, including that of the exchange-correlation kernel. For states that can be evolved from a ground state, all initial-state dependence is a dependence on a ...
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ژورنال
عنوان ژورنال: Journal of Chemical Theory and Computation
سال: 2015
ISSN: 1549-9618,1549-9626
DOI: 10.1021/acs.jctc.5b00342