Browsing Doctoral Degrees (Physics) by Title
Now showing items 54-73 of 93
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Numerical simulation of quantum spins in a dissipative environment.
(2015)When modelling real physical systems, one should always consider the influence of the environment. The study of open quantum systems aims precisely at the assessment of the role of the environment in the evolution of ... -
On the interaction of laser beams with air : with specific reference to refraction and scattering.
(1996)The interaction of laser light with a parcel of air with a known density structure can result in one of three reactions. The simplest of these reactions is reflection. Depending on the nature of the density profile, that ... -
Optimizing quantum communication through hybrid technology.
(2012)Quantum Key Distribution (QKD) is a symmetric key sharing protocol. The theoretical process exploits the principles of quantum physics to underpin a physical security against any form of eavesdropping. QKD not only ensures ... -
Optimizing the synthesis of vanadium oxide nano-structures by plasma plume dynamics.
(2016)Abstract available in PDF file. -
Photothermal refraction and focusing.
(1997)This thesis begins with an introduction to the interaction and refraction of light in continuous media. It is shown how these properties can be exploited to achieve focusing of parallel light rays in such a medium. Past ... -
Planetary waves and the global ozone distribution.
(1994)Planetary waves are known to play an important role in determining the annual variability in the severity of Antarctic ozone depletion. In this thesis, data obtained from the TOMS experiment on board the Nimbus-7 satellite ... -
Plasmon as a mechanism to improve performance of bulk-heterojunction organic solar cells.
(2022)Narrow optical absorption band of fullerene based organic photovoltaics (OPVs) is one of the challenges to produce efficient polymer based solar panels that compete with inorganic counter part. There have been efforts ... -
Probing the conceptions and mental models of students from diverse educational backgrounds in the context of a science centre show on sound.
(2016)Abstract available in PDF file. -
Quantum analogues of classical optimization algorithms.
(2017)This thesis explores the quantum analogues of algorithms used in mathematical optimization. The thesis focuses primarily on the iterative gradient search algorithm (algorithm for finding the minimum or maximum of a ... -
Quantum machine learning for supervised pattern recognition.
(2017)Humans are experts at recognising patterns in past experience and applying them to new tasks. For example, after seeing pictures of a face we can usually tell if another image contains the same person or not. Machine ... -
Quantum simulation of open quantum systems.
(2016)Over the last two decades the field of quantum simulations has experienced incredible growth, which, coupled with progress in the development of controllable quantum platforms, has recently begun to allow for the ... -
A ray tracing study of VLF phenomena.
(1997)Whistlers have, for many years, been used as probes of the ionosphere and magnetosphere. Whistlers received on the ground have been shown (Smith [1961], Helliwell [1965]) to have propagated, in almost all cases, through ... -
Refractive effects in phase objects and associated phenomena.
(1994)The effect of the refraction of a laser beam propagating through three different phase objects, i.e. a laser produced plasma and two different gas media, is investigated in this thesis. It is shown that these effects ... -
Simulating thermal fluctuations in soft matter models.
(2015)The research carried out in this work is in two parts: In the first part, we derive a configurational temperature Nosé-Hoover thermostat by reformulating the original Braga and Travis thermostat [J. Chem. Phys. 123 ... -
Solar influences on Polar ozone.
(1994)Measurements by the TOMS instrument aboard the Nimbus 7 satellite, of total column ozone over polar regions have been studied to determine the effects of solar induced natural ozone modulation. Two different analysis methods ... -
Sound transmission analysis by sound intensimetry.
(1985)This thesis represents the development and evaluation of a theory for sound transmission analysis by sound intensimetry. In the context of this study sound transmission analysis is understood to embrace the following: (1) ... -
The structural and mechanical properties of the Pt-Ti and Ir-Ti systems.
(2011)Ab initio plane wave based density functional calculations within the generalised gradient approximation (GGA) have been carried out on a wide range of phases and stoichiometries for the platinum-titanium (Pt-Ti) and ...