Essays about: "Configuration-interaction"
Showing result 1 - 5 of 11 essays containing the word Configuration-interaction.
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1. Atomic Structure Calculations Using Configuration-Interaction And Many-Body Perturbation Theory For Spectral Modelling Of Neutron Star Mergers : Example Of Ce I - Iv
University essay from Uppsala universitet/Teoretisk fysikAbstract : The binary neutron star merger of 2017 and its corresponding electromagnetic signature resembling that of a kilonova has been one of the most groundbreaking astrophysical occurrences in the last decade. Indications of r-process nucleosynthesis in this event presents new opportunities for learning about the astrophysical origin of heavy elements. READ MORE
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2. Beyond the Gross-Pitaevskii Equation: A Perturbative Approach
University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Teknisk fysik (CI)Abstract : We propose and implement a beyond Gross-Pitaevskii approach based on Many-Body Perturbation theory (MBPT) for the study of Bose-Einstein Condensate (BECs) ground states. Two partitions of the system Hamiltonian are considered. READ MORE
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3. Full Configuration Interaction Model for 1-D Quantum System
University essay from Lunds universitet/Matematisk fysik; Lunds universitet/Fysiska institutionenAbstract : The many-body problem is one of the most challenging problems in physics due to the complexity emerging from the interactions of many quantum particles. Since the advent of computers with increasing power, computational methods have been very successful in providing insight and precise solutions to this problem. READ MORE
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4. Beyond Mean-Field Description of Bose-Einstein Condensate
University essay from Lunds universitet/Matematisk fysik; Lunds universitet/Fysiska institutionenAbstract : This thesis work is on the theoretical description of dilute Bose-Einstein condensates (BEC) that are non-uniform, meaning that more than one single-particle state is occupied. This phenomenon is usually called quantum depletion. READ MORE
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5. Microscopic and Macroscopic Samples of Atoms in Superposition States Studied by Attosecond Pulses
University essay from Lunds universitet/Matematisk fysik; Lunds universitet/Fysiska institutionenAbstract : In the present thesis, the interaction between atoms in superposition states and attosecond pulses is studied from the microscopic to the macroscopic regime. Using a semi-classical framework, three different models have been explored in order to investigate attosecond light--matter interaction processes. READ MORE