Dokumente Fakultät für Physik (inkl. GAUSS) nach Gutachter "Kree, Reiner Prof. Dr."
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Free cooling of granular particles with rotational degrees of freedom
(2001-11-06)Aim of this theses is to elucidate the role of rotational degrees of freedom in a system of freely cooling granular particles. To gather more general aspects rough spherical particles and, as an example for non-spherical ... -
Funktionale Renormierungsgruppe für Nichtgleichgewichtsphänomene in Vielteilchensysteme
(2008-02-19)The aim of this work is the extension of the functional renormalization group (FRG) formalism to treat non-equilibrium situations. To this end, we reformulate the FRG equations in terms of the Keldysh method which is ... -
Mathematical Description of Differential Hebbian Plasticity and its Relation to Reinforcement Learning
(2009-11-18)The human brain consists of more than a billion nerve cells, the neurons, each having several thousand connections, the synapses. These connections are not fixed but change all the time. In order to describe synaptic ... -
Microscopic models of energy dissipation by internal degrees of freedom in particle collisions
(2001-11-06)A microscopy model of energy dissipation in collisions of macroscopic bodies is investigated. Dissipation of translational energy is modelled by excitation of elastic vibrations of the ... -
Modelling and simulation of surface morphology driven by ion bombardment
(2006-06-22)Non-equilibrum surfaces, at nanometer length scales, externally driven via bombardment with energetic particles are known to exhibit well ordered patterns with a variety of applications in ... -
Molecular Dynamics simulations of polymer liquids on substrates of different topography
(2013-02-04)The properties of polymer films and droplets at substrates of different topography are studied employing particle-based simulation techniques (Molecular Dynamics). The liquid is modeled by short coarse-grained polymer ... -
New Methods in NMR Spectroscopy for the Study of Protein Dynamics
(2009-01-21)The focus of this work has been the investigation of internal protein dynamics in a time window between the overall tumbling correlation time tau_c (a few nanoseconds) and about 50 microseconds ... -
Nonlinear Optical Effects in Pure and N-Doped Semiconductors
(2000-12-13)Over the last decades, the nonlinear optical properties of condensed matter systems have been an attractive and fruitful field of research. While the linear response functions of solids ... -
Orientational order and glassy states in networks of semiflexible polymers
(2011-02-01)Motivated by the structure of networks of cross-linked cytoskeletal biopolymers, the orientationally ordered phases in networks of randomly cross-linked semiflexible polymers are studied ... -
Phase Behavior of Liquid Crystals in Confinement
(2012-01-12)We use computer simulations to investigate the isotropic-to-nematic phase transition of liquid crystals. Using the Lebwohl-Lasher model with sophisticated algorithms, the phase transition ... -
Phase diagrams of two-dimensional frustrated spin systems
(2012-04-19)In this work the ordering processes in classical frustrated Ising models and the ground-state behavior of frustrated quantum spin models are investigated. In the first part the phase transition from a high-temperature ... -
Random Block Copolymer Melts in the Bulk and at Selective Substrates
(2011-12-15)Random block copolymers are polymers that consist of two different, randomly as- sembled types of blocks. Each of these blocks comprises one type of monomer and a repulsion between these ... -
Rheology of frictional grains
(2016-08-19)This thesis deals with the description of flow and arrest of granular matter. Granular matter can undergo a rigidity transition — called jamming — that is mainly controlled by the applied stresses and the packing fraction ... -
Single Particle Dynamics of Anderson-like Impurity Models: A Functional Renormalization Group Study
(2007-05-22)The Anderson Impurity Model is a generic model to describe systems in which one or more energy levels are coupled to an electronic host. On the energy levels the electrons are subject to a ... -
Spin-orbit interaction in quantum dots and quantum wires of correlated electrons - A way to spintronics?
(2008-11-25)We study the influence of the spin-orbit interaction on the electronic transport through quantum dots and quantum wires of correlated electrons. Starting with a one-dimensional infinite ... -
Structure formation in binary polymer systems: Short-time dynamics and dynamics of crosslinked systems
(2022-07-27)Structure evolution in multicomponent polymer melts and in their network equivalents is investigated. In the first part, particle-based simulations reveal that on short length and time scales, the collective kinetics of ... -
Study of active particles in heterogeneous media
(2018-09-07)In this thesis I present simulation-based studies of systems of self- propelled particles in heterogeneous media. I consider the interaction of particles with planar walls, single spherical obstacles or arrays of randomly ... -
Synchronisation Behaviour of Viscoelastically Coupled Self-Sustained Oscillators as Models for Oscillations of Premature Cardiomyocytes
(2017-11-22)This thesis analyses how the synchronisation behaviour of self-sustained oscillators is influenced by the viscoelastic properties of their coupling. This question is motivated by the early development stage of artificial ... -
Synchronization, Neuronal Excitability, and Information Flow in Networks of Neuronal Oscillators
(2012-09-27)Synchronization is an omnipresent phenomenon in the dynamics of complex neuronal networks, emerging between single neurons as the simultaneous generation of action potentials and on larger spatial scales in the ... -
Theoretical and experimental study of protein-lipid interactions
(2000-12-13)The thermotropic behavior of a lipid membrane incorporating small integral proteins is investigated. The theory is based on the two-state Ising model of which the distribution of ...