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Brownian motion in liquids : theory and experiment
(2017-08-04)
Since the theoretical work of Einstein [1905] and von Smoluckowski [1906], and the experiments of Perrin [1909], Brownian motion at long time-scales has been extensively studied for over a century. Short time-scale aspects ...
Classical and semi-classical analysis of Klein-Gordon field in a signature transition spacetime
(2018-06-25)
Classical and semiclassical analyses of a Klein-Gordon field minimally coupled to a fixed, signature-changing (Riemannian to Lorentzian) background are performed. The background spacetime is a toy model used to represent ...
Low temperature scanning tunneling microscope study of metallic thin films and nanostructures on the semiconductor substrates
(2008-12)
Many properties of the thin films are different from the bulk value and in many cases, depend dramatically on the film thickness. In the metallic ultra-thin films epitaxially grown on the semiconductor substrate, the ...
Strong correlations in bosons and fermions
(2008-08)
If there is a general theme to this thesis, it is the effects of strong correlations in both bosons and fermions. The bosonic system considered here consists of ultracold alkali atoms trapped by interfering lasers, so ...
Spatially resolved single atom detection of neutral atoms
(2006-08)
This thesis describes several new ideas towards spatially resolved single atom detection, using a magic wavelength and spatially resolved stimulated Raman transitions. After an introduction to the theory of AC-Stark shifts ...
Characterization of electron propagation via coherent transition radiation in two different conductivity regimes
(2015-05)
High intensity lasers interacting with an overdense target can accelerate high energy (“hot”) electrons at currents that would far exceed the Alfven limit. Hot electron propagation can be inhibited when bulk electron motion ...
Construction and assembly of a scanning tunneling microscope
(2011-08)
In the scope of this master thesis, a home-made brass scanning tunneling microscope
(STM) was machined, assembled and tested for its functionality. For
this microscope, a new approach-technique was used which follows the ...
Discontinuous Galerkin modeling of plasma turbulence in a simple magnetized torus
(2019-06-13)
Plasma turbulence in the Texas Helimak, a simple magnetized torus (SMT) experiment, has been simulated with fluid and gyrokinetic continuum models that employ the discontinuous Galerkin (DG) computational method. SMTs are ...
Pair condensation in polarized fermion systems
(2006)
In this thesis we study the spin or pseudospin singlet pair condensation of
two different kinds of polarized fermion systems. Using generalized BCS mean-field
theories we study how pairing adapts to unequal spin or ...
Controlling infrared radiation with subwavelength metamaterials and silicon carbide
(2011-05)
The control and manipulation of infrared (IR) radiation beyond the capabilities of natural materials using silicon carbide (SiC), metamaterials, or a combination thereof, is presented. Control is first demonstrated using ...