Search for dissertations about: "Emanuel Rubensson"
Showing result 1 - 5 of 7 swedish dissertations containing the words Emanuel Rubensson.
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1. Sparse Matrices in Self-Consistent Field Methods
Abstract : This thesis is part of an effort to enable large-scale Hartree-Fock/Kohn-Sham (HF/KS) calculations. The objective is to model molecules and materials containing thousands of atoms at the quantum mechanical level. HF/KS calculations are usually performed with the Self-Consistent Field (SCF) method. READ MORE
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2. Matrix Algebra for Quantum Chemistry
Abstract : This thesis concerns methods of reduced complexity for electronic structure calculations. When quantum chemistry methods are applied to large systems, it is important to optimally use computer resources and only store data and perform operations that contribute to the overall accuracy. READ MORE
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3. Inverse factorization in electronic structure theory : Analysis and parallelization
Abstract : This licentiate thesis is a part of an effort to run large electronic structure calculations in modern computational environments with distributed memory. The ultimate goal is to model materials consisting of millions of atoms at the level of quantum mechanics. READ MORE
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4. Parallelization of dynamic algorithms for electronic structure calculations
Abstract : The aim of electronic structure calculations is to simulate behavior of complex materials by resolving interactions between electrons and nuclei in atoms at the level of quantum mechanics. Progress in the field allows to reduce the computational complexity of the solution methods to linear so that the computational time scales proportionally to the size of the physical system. READ MORE
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5. Error Estimation and Adaptive Methods for Molecular Dynamics
Abstract : This thesis consists of two papers that concern error estimates for the Born-Oppenheimer molecular dynamics, and adaptive algorithms for the Car-Parrinello and Ehrenfest molecular dynamics. In Paper I, we study error estimates for Born-Oppenheimer molecular dynamics with nearly crossing potential surfaces. READ MORE