Browsing Fakultät für Physik (inkl. GAUSS) by Advisor "Geisel, Theo Prof. Dr."
Now showing items 1-20 of 20
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Anomalous Diffusion in Ecology
(2015-01-14)As measurement techniques improve and increasingly sophisticated analysis methods are more common, biology becomes subject to the wide range of treatments coming from physics. In this thesis, we consider a specific ... -
Ballistic electron transport in graphene nanodevices and billiards
(2019-10-17)Nanodevices are objects with broad relevance for today's society, which bases its economy, operation, and communication onto digital resources. In ballistic nanodevices, disorder has either negligible or minor impact on ... -
Branched Flow and Caustics in Two-Dimensional Random Potentials and Magnetic Fields
(2010-09-14)Branched flow is a universal phenomenon of two-dimensional wave or particle flows which propagate through a weak random potential. Its origin is the formation of caustics, which are locations ... -
Bursting dynamics and topological structure of in vitro neuronal networks
(2012-11-15)The complex relationship between network structure and dynamics is investigated in neuronal networks in vitro. The most prominent dynamics in these cultured networks is synchronous bursting. As the onset of these bursts ... -
Collective Dynamics in Networks of Pulse-Coupled Oscillators
(2003-02-25)Pulse-coupled oscillators constitute a paradigmatic class of dynamical systems interacting on networks. They model a variety of natural systems including earthquakes, flashing fireflies and ... -
Data Analysis of Musical Timeseries
(2024-01-08)Music, despite its ubiquitous familiarity, is surprisingly hard to define. Should one consider its acoustic features, the mechanics by which it is produced and performed, as well as the cultural norms attached to them, ... -
Data driven analysis of brain activity and functional connectivity in fMRI
(2003-12-18)In this thesis the perspectives of statistical and graph-theoretical methods for the analysis of fMRI data are investigated. This involves preprocessing, extraction of components, functional ... -
Dynamics of Population Coding in the Cortex
(2005-08-19)In this thesis, I investigate the action potential (AP) initiation dynamics in cortical neurons and its consequences for dynamical population coding in the cortex.In chapter 3, I assess the ... -
Encoding of complex sounds in the auditory midbrain
(2015-06-16)How complex natural sounds such as speech and vocalizations are encoded in the main converging center of the auditory midbrain is not yet fully understood. For multi-units, which are composed of several single neurons, ... -
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 ... -
Open Mesoscopic Systems: beyond the Random Matrix Theory
(2003-08-19)Physical systems having sizes between microscopic and macroscopic are referred to as mesoscopic. The motion in mesoscopic systems is phase-coherent, that means they must be treated ... -
Parametric Bose-Hubbard Hamiltonians: Quantum Dissipation, Irreversibility, and Pumping
(2008-09-11)In this thesis, we study interacting bosons on lattices consisting of a few sites. The main focus is on their response to external driving fields, their transport and decay properties. We ... -
Quantenmechanik zwischen Regularität und Chaos
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Random Focusing of Tsunami Waves
(2015-11-09)Branched flow is a universal phenomenon of random focusing that occurs in wave or particle flows that propagate in weakly scattering, correlated random media. The consecutive effect of small random forces leads to regions ... -
Scale-free Fluctuations in in Bose-Einstein Condensates, Quantum Dots and Music Rhythms
(2010-05-25)Mesoscopic systems are prone to substantial fluctuations that typically can not be neglected or avoided. The understanding of the origin and the consequences of these fluctuations (e.g.~for ... -
Superdiffusion in Scale-Free Inhomogeneous Environments
(2003-08-21)We investigate the impact of external potentials on superdiffusive random walks known as Lévy flights and show that even strongly superdiffusive transport is substantially affected by ... -
The Time Course of Negative Priming
(2010-03-23)Selective attention enables goal-directed behavior despite the permanent, immense input to the sensory system. Contradicting early speculations of an active attending and passive ignoring, ... -
Transport in Hamilton-Systemen: Von der Klassik zur Quantenmechanik
(2002-04-24)This thesis deals with classical and quantum mechanical transport properties of low dimensional Hamiltonian systems that possess a mixed phase space. It is demonstrated that even in ideal ... -
Transport, disorder and reaction in spreading phenomena
(2009-12-01)Mostly motivated by recent empirical findings on human and animal mobility, superdiffusion in the presence of inhomogeneities as well as spatial spread of infectious diseases due to ...