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Identifier uch.physics.phd//1996stratopoulos
Title Dynamics of vortices in 2-dimensional charged fluids
Alternative Title Δυναμική των δινών σε διδιάστατα φορτισμένα ρευστά
Author Στρατόπουλος, Γεώργιος Ν
Thesis advisor Τομαράς, Θεόδωρος
Abstract The work in this thesis is concerned with the study of some aspects of the physics of flux vortices within the framework of dynamical Ginzburg-Landau model, relevant to the description of a superconductor or of an idealized bosonic plasma. It is shown that a non-relativistic scalar field coupled minimally to electromagnetism supports in the presence of a homogeneous background electric charge density the existence of smooth, finite-energy topogically stable flux vortices. The static properties of such vortices and vortex-pairs are studied in detail. By using a constrained variational calculation,the interaction potential of two minimal vortices is obtained. It is proven analytically that a free vortex is spontaneously pinned, while under the action of an external force it moves with a calculable speed perpendicular to it. Finally the motion of vortices under the influence of several external probes is studied nymerically. It is shown that up to a fine "cyclotron" internal motion, also studied in detail, two vortices brought together, rotate around each other, while a vortex and an antivortex move in formation parallel to each other.The drift of the vortex under the influence of a homogeneous external current, in a direction opposite to the current is also demostrated. The velocities of the vortices in the above cases are measured to be in remarkable agreement with recent theoretical predictions.
Language English
Issue date 1996-02-12
Collection   School/Department--School of Sciences and Engineering--Department of Physics--Doctoral theses
  Type of Work--Doctoral theses
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