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Now showing items 1-20 of 115

    • Additional degrees of freedom associated with position measurements in non-commutative quantum mechanics 

      Rohwer, Christian M. (Stellenbosch : University of Stellenbosch, 2010-12)
      ENGLISH ABSTRACT: Due to the minimal length scale induced by non-commuting co-ordinates, it is not clear a priori what is meant by a position measurement on a non-commutative space. It was shown recently in a paper by ...

    • Alpha cluster structure and scattering in 20Ne, 44Ti, 94Mo, 136Te and 212Po 

      Ndayishimye, Joram (Stellenbosch : University of Stellenbosch, 2011-03)
      ENGLISH ABSTRACT: We investigate the nuclei 20Ne, 44Ti, 94Mo, 136Te and 212Po using a model of an α-cluster orbiting a closed shell core. A purely phenomenological cluster-core potential is found to provide a successful ...

    • Analysis and applications of the generalised Dyson mapping 

      Snyman, Izak (Stellenbosch : Stellenbosch University, 2004-12)
      ENGLISH ABSTRACT: In this thesis, generalized Dyson boson-fermion mappings are considered. These are techniques used in the analysis of the quantum many-body problem, and are instances of so-called boson expansion ...

    • Aspects of quantum field theories 

      Van Biljon, Andrew (Stellenbosch : Stellenbosch University, 1997)
      ENGLISH ABSTRACT: In this study project we give a general introduction to quantum field theories. In the first chapter we revise the operator formalism of quantum mechanics as well as the second quantization scheme that ...

    • Basic concepts of random matrix theory 

      Van Zyl, Alexis J. (Stellenbosch : University of Stellenbosch, 2005-12)
      It was Wigner that in the 1950’s first introduced the idea of modelling physical reality with an ensemble of random matrices while studying the energy levels of heavy atomic nuclei. Since then, the field of Random Matrix ...

    • Biofilament interacting with molecular motors 

      Meylahn, Janusz Martin (Stellenbosch : Stellenbosch University, 2015-12)
      ENGLISH ABSTRACT: We study molecular motors moving along a filament or polymer using two different mathematical models in which motors are idealised as springs. In the first model we study the average and the fluctuations ...

    • Bound states near the interface of a distorted graphene sheet and a superconductor 

      Van Zyl, Hendrik Jacobus Rust (Stellenbosch : Stellenbosch University, 2011-12)
      ENGLISH ABSTRACT: The goal of this thesis is to investigate the effects of distorting a graphene lattice and connect- ing this distorted graphene sheet to a superconductor. At low energies the possible excitation states ...

    • Cave front tracking experiment 

      Green, Mark (Stellenbosch : Stellenbosch University, 2016-12)
      ENGLISH ABSTRACT : Seismic tomography, a procedure to trace seismic wave velocity variation, has been used for more than 100 years to “see through rock”. Initially the recording of seismic waves from natural sources ...

    • A characterization of beam shaping devices and a tunable Raman laser 

      Du Plessis, Anton (Stellenbosch : University of Stellenbosch, 2003-04)
      ENGLISH ABSTRACT: The efficient manipulation of various nonlinear optical processes frequently requires the shaping of the laser beams used for these processes. Three beam shaping techniques were investigated in this ...

    • Characterization of the pre-eminent 4-α cluster state candidate in 16O 

      Li, Kevin Ching Wei (Stellenbosch : Stellenbosch University, 2015-12)
      ENGLISH ABSTRACT: Please see full text for abstract

    • Characterization of thulium doped fiber for mid infrared laser applications 

      Ndebeka, Wilfrid Innocent (Stellenbosch : University of Stellenbosch, 2011-03)
      Please refer to full text to view abstract.

    • Cluster model analysis of exotic decay in actinide nuclei 

      Du Toit, Erasmus Johannes (Stellenbosch : Stellenbosch University, 2014-12)
      ENGLISH ABSTRACT: The binary cluster model is used to investigate the properties of exotic structures and decays in various nuclei. A simple method is described to choose the possible clusters forming within the nucleus, ...

    • Collective coordinate description of kink-antikink interaction 

      Takyi, Ishmael (Stellenbosch : Stellenbosch University, 2015-12)
      ENGLISH ABSTRACT: In this thesis we explore resonance solutions in one space and one time dimensions in the nonlinear non-integrable ø⁴ and ø⁶ models. These resonances occur when the relative velocity between the kink ...

    • Computing the Arnold Tongue in the Zipoy-Voorhees Space-time 

      Sherif, Abbas Mohamed (Stellenbosch : Stellenbosch University, 2017-03)
      ENGLISH ABSTRACT : In this thesis I study the integrability of the geodesic equations of the ZipoyVoorhees metric. The Zipoy-Voorhees spacetime is a one parameter family of Stationary Axisymmetric Vacuum spacetimes (SAV’s) ...

    • Constructing dualities from quantum state manifolds 

      Van Zyl, Hendrik Jacobus Rust (Stellenbosch : Stellenbosch University, 2015-12)
      ENGLISH ABSTRACT: A constructive procedure to build gravitational duals from quantum mechanical models is developed with the aim of studying aspects of the gauge/gravity duality. The construction is simplified as far as ...

    • Construction and characterization of a multi-antenna terahertz time-domain spectroscopy setup 

      Smith, Shane Raymond (Stellenbosch : Stellenbosch University, 2015-04)
      ENGLISH ABSTRACT: Recent progress in laser and semiconductor technology has allowed for far easier generation and measuring of coherent terahertz radiation, a previously difficult region in the radiation spectrum to ...

    • Correlations between the standard and alternative definitions of the beam quality factor 

      Strauss, Hencharl Johan (Stellenbosch : University of Stellenbosch, 2005-04)
      ENGLISH ABSTRACT: The beam quality factor (M2) of a laser is important because it describes both the quality of a laser beam as well as its propagation. Particular applications require that the beam radii (from which ...

    • Cross sections and analysing power energy-sharing distributions of valence (p,2p)-knockout from 208Pb with a projectile of 200MeV 

      Bezuidenhout, Jacques (Stellenbosch : Stellenbosch University, 2000-12)
      ENGLISH ABSTRACT: The aim of this work was to study the 208Pb(p,2p)207Tl quasi-free knockout process. The experimental data were measured at the National Accelerator Centre using incident polarised protons of 200 MeV. ...

    • Crossovers and phase transitions in Bose-Fermi mixtures 

      Kimene Kaya, Boniface Dimitri Christel (Stellenbosch : Stellenbosch University, 2014-04)
      ENGLISH ABSTRACT: We present a theoretical approach that allows for the description of trapped Bose-Fermi mixtures with a tunable interspecies interaction in the vicinity of a Feshbach resonance magnetic field.The many-body ...

    • Deflection of Ag-atoms in an inhomogeneous magnetic field 

      Kheswa, Bonginkosi Vincent (Stellenbosch : Stellenbosch University, 2011-12)
      ENGLISH ABSTRACT: In the current design of the high temperature gas cooled reactor, a small fraction of coated fuel particles will be defective. Hence, 110Ag may be released from the fuel spheres into the coolant gas ...