Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"random potential"”.
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Classical diffusion of a particle in a one dimensional random potential
… the classical particle to an additional random potential and it is the form of this random potential that is of interest. We consider two forms of the random potential and calculate several disorder averaged quantities including the particles probability distribution which is described by …
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Study of exciton localized by random potential in indirect gallium arsenide phosphide alloys
… the MO band as due to excitons localized by the random potentials in the alloys. Lifetime measurements show that the Mx/0 excitons are relatively long lived (tens of microseconds) and it varies over the spectral regions of the M~ emission band. This can be understood in terms of the …
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The scattering and shrinking of a Gaussian wave packet by delta function potentials
… wish to test the hypothesis that scattering by a random potential causes localization of wave functions, and that this localization is governed by the Born postulate of quantum mechanics. We begin with a simple model system: a one-dimensional Gaussian wave packet incident from the left onto a …
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Quantum evolution: The case of weak localization for a 3D alloy-type Anderson model and application to Hamiltonian based quantum computation
… to free motion of an electron and a random potential generated by a sign-indefinite single-site potential. The result shows that localization occurs in the weak disorder regime, i.e., when the coupling parameter λ is very small, for energies E ≤ −Cλ² . The second part of this …
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Subsurface Charge Accumulation imaging of the quantum Hall liquid
… the 2DES we produce a topographic map of the random potential inside the integer quantum Hall liquid.
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Computational modelling of the vortex state in high-temperature superconductors
… applicable for a K0-Bessel function interaction potential.<br/><br/>Using these methods, we investigate a two-dimensional vortex system driven over a weak random potential. We observe the moving Bragg glass regime, and study the recently predicted critical transverse force. Our results agree with …
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Regeneration mechanisms of organized structures in near-wall turbulence
… s sum of a mean turbulent velocity profile and random potential perturbations, conclusively supports the fact that organised vortices are not needed for generation of near-wall streaks. It has also been demonstrated that the lift-up mechanism responsible for generation of streaks is also …
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Coupling in SPDEs and spectral analysis of heavy-tailed random operators
… work of the author in stochastic analysis and random operators (random Schrödinger operators and random matrices). It is divided into three parts. In the first part, the author considers infinite dimensional stochastic PDEs defined on an abstract Hilbert space, and the main contribution is a …