Astl, Stefan Ludwig(Stellenbosch : Stellenbosch University, 2013-12)
ENGLISH ABSTRACT:
Techniques for estimating a signal in the presence of noise which contains outliers are currently
not well developed. In this thesis, we consider a constant signal superimposed by a family of
noise ...
ENGLISH ABSTRACT: The following work focuses on the development and characterization of efficient,
high-power, Thulium doped fibre lasers. Lasers emitting light around ~2 μm have
generated a large amount of interest owing ...
ENGLISH ABSTRACT: Low-dimensional materials are known to undergo phase transitions to differently or-
dered states, when cooled to lower temperatures. These phases often show a periodic
modulation of the charge density ...
Elnour, Huzifa Mohammed Ahamed Mohammed(Stellenbosch : Stellenbosch University, 2013-12)
ENGLISH ABSTRACT: A Magneto Optical Trap (MOT) is a configuration formed by three orthogonal pairs of counterpropagating
circularly polarized laser beams and a magnetic field gradient. A MOT is used to
cool, capture and ...
ENGLISH ABSTRACT: An ultra-fast laser pulse can be described in the time or frequency domain. If the timebandwidth
product of an ultra-fast pulse is not satisfied, then the pulse is stretched. Stretching
can be described ...
Collett, Oliver John Philip(Stellenbosch : Stellenbosch University, 2013-03)
This work is a thesis regarding the energy scaling of end-pumped Ho:YLF amplifiers. The work
includes: a brief review of laser physics and models, the development of a suitable three dimensional
time resolved numerical ...
Nortje, Anton Christiaan(Stellenbosch : Stellenbosch University, 2013-03)
ENGLISH ABSTRACT: A tunable narrow-bandwidth vacuum ultra violet laser source was developed
and characterised. Two-photon resonant four-wave sum-frequency mixing of
two pulsed dye laser beams in magnesium vapour was used ...
ENGLISH ABSTRACT: In this thesis I study compact objects described by the Manko-Novikov spacetime. The Manko-
Novikov spacetime is an exact solution to the Einstein Field Equations that allows objects to be
black hole-like, ...
ENGLISH ABSTRACT: In this thesis the structural dynamics, upon photo-excitation, of the charge-densitywave
(CDW) material 4Hb-TaSe2 is investigated on the time-scale of atomic motion
and simultaneously on the spatial-scale ...
Scholtz, F. G.Bartlett, Bruce H.Geyer, H. B.(American Physical Society (APS), 2003-08)
We show that Wegner’s flow equations, as recently discussed in the Lipkin model, can be solved selfconsistently.
This leads to a nonlinear differential equation which fully determines the order parameter
as a function ...
ENGLISH ABSTRACT: Ultra-short laser pulses are useful in materials processing like melting and cutting metals,
and medical applications such as surgery and many other fields. In this study, we characterize
and control ...
ENGLISH ABSTRACT: Terahertz radiation is currently used in security, information and communication technology
(ICT), and biomedical sciences among others. The usability of terahertz (THz)
radiation, in many of its ...
ENGLISH ABSTRACT: The experimental observation of the quantum Hall effect in a two-dimensional electron gas posed
an intriguing question to theorists: Why is the quantization of conductance so precise, given the
imperfections ...
ENGLISH ABSTRACT: The primary circuit components of very high temperature reactors (VHTRs) experience various unwanted
fission products such as Kr, Xe, I, Cs, Sr, and Ag. These particle are generated during normal ...
ENGLISH ABSTRACT: The availability of laser systems capable of generating ultrashort optical pulses in the visible
spectral range have made it possible to study molecular species with a temporal resolution
in the order ...
Diener, Jacobus Petrus Willem(Stellenbosch : Stellenbosch University, 2012-12)
ENGLISH ABSTRACT: We consider the ferromagnetic phase in pure neutron matter as well as charge neutral, betaequilibrated
nuclear matter. We employ Quantum Hadrodynamics, a relativistic field theory
description of nuclear ...
Abdelhady, A. M. H. H.(Stellenbosch : Stellenbosch University, 2012-12)
ENGLISH ABSTRACT: Crossing symmetry relates scattering and annihilation processes to each other. Its derivation
is straightforward in perturbative approaches to quantum field theory: it merely
reflects the exchange of ...