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Definitions for "QCISD"
Keywords:  quadratic, perturbative, triple, excitations, ccsd
Related Terms: String theory, Hamiltonian, String, Einstein, Perturbation theory, Grand unified theory, Quantum theory, Wave function, Quantum gravity, Duality, Quantum mechanics, Boolean operation, Quantum, Standard model, Fundamental interaction, Dyad, Hund's rule, Merge, Dalton, Resonance, Magnetic monopole, Uncertainty principle, Bell's theorem, Least common multiple, Wavefunction, Boolean algebra, Einstein, albert, Single, Shanghai, Complementarity, Planck's constant, Atomic theory, Pythagorean triple, Supersymmetry, Boolean operations, Cardinal number, Pauli exclusion principle, 23, Quantum numbers, Infinite geometric series, Logarithm, Least common denominator, Double precision, Relativistic, Arithmetic sequence, Orbital, Exclusion principle, Wave-particle duality, Ring
Quadratic configuration interaction, singles and doubles. (See QCI.)
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QCISD with a correction for triples. This method is at the core of the popular G2 theory. Usually gives similar results as CCSD(T), of which it is a truncation.
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Quadratic CI with Single and Double excitations, see also CISD.
iupac.org
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