Exterior Complex Scaling Approach for Atoms and Molecules in Strong DC Fields

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dc.contributor.advisorHorbatsch, Marko M.
dc.contributor.authorPirkola, Patrik Cristian
dc.date.accessioned2021-07-06T12:43:30Z
dc.date.available2021-07-06T12:43:30Z
dc.date.copyright2021-02
dc.date.issued2021-07-06
dc.date.updated2021-07-06T12:43:30Z
dc.degree.disciplinePhysics And Astronomy
dc.degree.levelMaster's
dc.degree.nameMSc - Master of Science
dc.description.abstractWe perform a short review of the history of quantum mechanics, with a focus on the historical problems with describing ionization theoretically in the context of quantum mechanics. The essentials of the theory of resonances are presented. The exterior complex scaling method for obtaining resonance parameters within the context of the Schrodinger equation is detailed. We explain how this is implemented for a numerical solution using a finite element method for the scaled variable. Results for the resonance parameters of a one-dimensional hydrogen model in an external direct current (DC) electric field are presented as proof of the independence of the theory from the scaling angle. We apply the theory to the real hydrogen atom in a DC field and present results which agree with literature values. The resonance parameters for singly ionized helium are also presented. Using a model potential energy for the water molecule, we solve for the energy eigenvalues. We then solve for the resonance parameters of the water molecule in a DC field and compare to literature results. Our widths for the valence orbital are shown to agree well with the so-called "coupled-cluster singles and doubles with perturbative triples excitations" method.
dc.identifier.urihttp://hdl.handle.net/10315/38442
dc.languageen
dc.rightsAuthor owns copyright, except where explicitly noted. Please contact the author directly with licensing requests.
dc.subjectQuantum physics
dc.subject.keywordsHydrogen Helium Water Ionization Resonances Exterior Complex Scaling Quantum Mechanics Matrix Mechanics Schrodinger Equation Atomic Physics Molecular Physics
dc.titleExterior Complex Scaling Approach for Atoms and Molecules in Strong DC Fields
dc.typeElectronic Thesis or Dissertation

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