Search for dissertations about: "exchange interactions electron"

Showing result 1 - 5 of 39 swedish dissertations containing the words exchange interactions electron.

2. 1. Interactions, initial states, and low-dimensional semiconductors

   Author : Peter Jaksch; Stephanie M. Reimann-Wacker; Linköpings universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Q!uantum mechanical interactions; quantum point contact QPC ; quantum wires; exchange-correlation energy; Reilly model; quantum algorithms; Physics; Fysik;

   Abstract : This thesis is concerned with different aspects of quantum mechanical interactions. The first part of the thesis focuses on their effects in low-dimensional semiconductors; the second part on one of their applications: quantum algorithms, which utilize superpositions created from quantum mechanical interactions. READ MORE

4. 2. Molecular recognition and dynamics in proteins studied by NMR

   Author : Johan Wallerstein; Biofysikalisk kemi; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Chemical exchange; Conformational entropy; Entropy; Galectin-3; Isothermal Titration Calorimetry; ITC; Model-free formalism; Molecular recognition; Nuclear Magnetic Resonance; NMR; PGB1; Protein dynamics; Protein–ligand interactions; Proton-transfer reactions; Spin relaxation; Viscosity; Chemical exchange; Conformational entropy; Entropy; Galectin-3; Isothermal Titration Calorimetry; ITC; Model-free formalism; Molecular recognition; Nuclear Magnetic Resonance; NMR; PGB1; Protein dynamics; Protein–ligand interactions; Proton-transfer reactions; Spin relaxation; Viscosity;

   Abstract : Knowledge of dynamics in protein is very important in the description of protein function and molecular recognition. The thesis investigates protein dynamics on time-scales from milli- to sub-nanosecond, with focus on the latter, using NMR spin relaxation experiments on two proteins, the 138-residue carbohydrate recognition domain of galectin-3 (Gal3C) and the 56-residue B1 domain of bacterial protein G (PGB1). READ MORE

5. 3. Complex patterns : from physical to social interactions

   Author : Andreas Grönlund; Petter Minnhagen; Hawoong Jeong; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Complex networks; collective dynamics; statistical physics; random graphs; Statistical physics; Statistisk fysik;

   Abstract : Interactions are what gives us the knowledge of the world around us. Interactions on all levels may fundamentally be seen as an exchange of information and a possible response of the same. Whether it is an electron in an electrical field or a handsome dude in a bar responding to a flirtation---interactions make things happen. READ MORE

6. 4. Beyond scattering – what more can be learned from pulsed keV ion beams?

   Author : Svenja Lohmann; Daniel Primetzhofer; Andreas Wucher; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Charge exchange; Deep UV photons; Electron emission; Silicon; Sputtering; TOF-MEIS; Fysik; Physics;

   Abstract : Interactions of energetic ions with matter govern processes as diverse as the influence of solar wind, hadron therapy for cancer treatment and plasma-wall interactions in fusion devices, and are used for controlled manipulation of materials properties as well as analytical methods. The scattering of ions from target nuclei and electrons does not only lead to energy deposition, but can induce the emission of different secondary particles including electrons, photons, sputtered target ions and neutrals as well as nuclear reaction products. READ MORE

7. 5. A first-principles approach to protein–ligand interaction

   Author : Pär Söderhjelm; Beräkningskemi; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; solvation; exchange repulsion; polarizable force fields; polarization; molecular mechanics; quantum chemistry; intermolecular interactions; protein–ligand interaction;

   Abstract : It is still impossible to make an accurate, purely theoretical prediction of the free energy of a ligand binding to a protein in aqueous environment. The two main problems are the immense number of nuclear configurations contributing to the binding free energy and the impossibility to apply accurate quantum-chemical methods to such a large system, even for a single configuration. READ MORE