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- W2937876689 abstract "A method is implemented wherein numerical approximations to the groundand first few excited states of a quantum mechanical N -body 1D harmonicoscillator are found through variational methods, representing the states as alinear combination of normalized pseudo-states which are themselves linearcombinations of non-orthogonal Slater determinants. These states are thenused as a low energy basis for configuration interaction. An expression isderived for an analytical matrix derivative of the energy functional, in orderto improve the speed of the variation.The speed and accuracy using the analytical derivative is compared tothat of the numerical derivative, and a number of different gradient descentmethods are tried and compared." @default.
- W2937876689 created "2019-04-25" @default.
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- W2937876689 date "2018-01-01" @default.
- W2937876689 modified "2023-09-27" @default.
- W2937876689 title "Excited States in Variational Many-Body Approaches" @default.
- W2937876689 hasPublicationYear "2018" @default.
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