Conveners
Theoretical and Computational Physics
- Alan Cornell (NITheP)
Theoretical and Computational Physics
- William Horowitz (University of Cape Town)
Theoretical and Computational Physics
- Thomas Konrad (UKZN)
Theoretical and Computational Physics
- Konstantin Zloshchastiev (Durban University of Technology)
Theoretical and Computational Physics
- Daniel Mojalefa Moeketsi (CSIR Meraka Institute (CHPC))
Theoretical and Computational Physics
- There are no conveners in this block
Theoretical and Computational Physics
- There are no conveners in this block
Theoretical and Computational Physics
- There are no conveners in this block
Theoretical and Computational Physics
- There are no conveners in this block
Theoretical and Computational Physics
- There are no conveners in this block
Prof.
Madan Singh
(National University of Lesotho)
26/06/2018, 10:00
Track G - Theoretical and Computational Physics
Oral Presentation
The physical properties of materials change when the size of the material approaches from bulk to nanoscale. The size effect is taken by increasing the fraction of the surface atoms with lower coordination numbers, therefore increasing number of dangling bonds, which results in causing the thermodynamical properties as cohesive energy at nanoscale. The cohesive energy of nanoparticles...
Dr
George Manyali
(Masinde Muliro University of Science and Technology)
26/06/2018, 10:20
Track G - Theoretical and Computational Physics
Oral Presentation
Silicon tellurides are being considered for next-generation non-volatile memory material. For the applications of these materials in electronic devices, it is necessary to provide information on their thermodynamic and mechanical stabilities, structural, electronic and optical properties based on first-principles density-functional theory. The obtained results are compared with experiment
and...
Dr
Daniel Mojalefa Moeketsi
(CSIR Meraka Institute (CHPC))
26/06/2018, 10:40
Track G - Theoretical and Computational Physics
Oral Presentation
The Centre for High Performance Computing (CHPC) is part of the National Integrated Cyber-Infrastructure System of the government of South Africa. It was established in 2007 by Department of Science and Technology and is managed by the Council for Scientific and Industrial Research (CSIR). Its mandate is to provide world class computational resources to research community across different...
Dr
Mukesh Kumar
(University of the Witwatersrand)
26/06/2018, 11:20
Track G - Theoretical and Computational Physics
Oral Presentation
Evidences of new physics begins from the updated data sets at the ATLAS and CMS detectors based at the Large Hadron Collider. Among the noted deviations in multi-lepton final states which leads signatures of the heavy scalars beyond the Standard Model Higgs boson, in this talk we discuss how these deviations can be explained by introducing two scalars of masses around 150 and 270 GeV in an...
Mr
Paul Henry Williams
(Stellenbosch University)
26/06/2018, 11:40
Track G - Theoretical and Computational Physics
Oral Presentation
We show that it is in principle possible to construct dualities between commutative and noncommutative theories in a systematic way. This construction exploits a generalization of the exact renormalization group equation (ERG). This link can also be understood as a blocking (coarse graining) transformation of the degrees of freedom. We apply this to the simple case of the Landau problem and...
Prof.
Thomas Konrad
(UKZN)
26/06/2018, 12:00
Track G - Theoretical and Computational Physics
Oral Presentation
We describe a method based on a sequence of measurements combined with feedback that allows us to prepare a quantum system in a target state or smooth target dynamics and protect it against noise. The convergence for arbitrary initial states is based on the gradual increase of information about the post-measurement state in the course of the measurements, which have to be weak in order to...
Prof.
Alan Cornell
(NITheP)
26/06/2018, 12:20
Track G - Theoretical and Computational Physics
Oral Presentation
In this talk we consider spin-3/2 fields in a D-dimensional Reissner-Nordstrom black hole spacetime. As these spacetimes are not Ricci-flat, it is necessary to modify the covariant derivative to the supercovariant derivative, by including terms related to the background electromagnetic fields, so as to maintain the gauge symmetry. Using this supercovariant derivative we arrive at the...
Mr
Neo Namane
(North West University)
26/06/2018, 12:40
Track G - Theoretical and Computational Physics
Oral Presentation
The purpose of this paper is to investigate the oscillatory behavior of the universe through the Schrödinger equation and a modified gravitational background described by the theory of f(R) gravity. Motivation for this stems from the proven periodic structure of the universe when described within the scope of the general theory of relativity. A further analysis of different f(R) toy models and...
Mr
Ernst Grunow
(University of Cape Town)
27/06/2018, 10:00
Track G - Theoretical and Computational Physics
Oral Presentation
Relativistic hydrodynamics has been the tool of choice to simulate the dynamics of the quark-gluon plasma produced in heavy-ion collisions.
Despite the success of hydrodynamics, it has several shortcomings stemming from the fact that it assumes a system close to equilibrium.
An alternative to hydrodynamics is solving the Boltzmann equation, which describes the evolution of the full...
Dr
William Horowitz
(University of Cape Town)
27/06/2018, 10:20
Track G - Theoretical and Computational Physics
Oral Presentation
We present quantitative predictions for the spectra of photon bremsstrahlung from heavy quarks propagating through a strongly-coupled quark-gluon plasma using the techniques of AdS/CFT. The spectra are the result of including both drag and diffusion terms in the heavy flavor propagation in the plasma. The predictions show that future experimental upgrades and high-luminosity runs at the...
Mr
Thendo Emmanuel Nemakhavhani
(University of Johannesburg)
27/06/2018, 10:40
Track G - Theoretical and Computational Physics
Oral Presentation
Thermal conductivity of hadron matter is studied using a microscopic transport model, which can support the newly Large Hadron Collider (LHC) energy of up to √s = 14 TeV, namely the Ultra-relativistic Quantum Molecular Dynamics (UrQMD). The molecular dynamics simulation is performed for a system of light mesons species (pions, rhos, Kaons) in a box with periodic boundary conditions....
Mr
Brent Harrison
(University of Cape Town)
27/06/2018, 11:20
Track G - Theoretical and Computational Physics
Oral Presentation
We present a novel numerical scheme to solve the QCD Boltzmann equation in the small-scattering angle approximation, for the quenched limit of QCD. Using this we can investigate the evolution of spatially homogeneous systems of gluons distributed isotropically in momentum space.
We numerically confirm results of Blaizot et al, in particular that for certain “overpopulated” initial...
Ms
Nicole Moodley
(University of Cape Town)
27/06/2018, 11:40
Track G - Theoretical and Computational Physics
Oral Presentation
Using the case study of a spatially homogeneous many-gluon system, distributed isotropically in momentum space, we will investigate more thoroughly than in the existing literature the evolution of a hot (quark-) gluon plasma from an initial state towards equilibrium. To that end we will investigate the QCD Boltzmann Equation beyond the popular soft-scattering approximation, thereby shedding...
Mr
Blessed Ngwenya
(University of Cape Town)
27/06/2018, 12:00
Track G - Theoretical and Computational Physics
Oral Presentation
Heavy ion collisions at RHIC and at the LHC produce an enormous amount of energy that enables the nuclei and its constituent particles to melt, thus releasing gluons, quarks and antiquarks, travelling in different directions with different momenta. Studies of these collisions have shown that low transverse momentum observables describe a strongly coupled plasma (quark-gluon plasma), an almost...
Prof.
Alan Cornell
(NITheP)
27/06/2018, 12:20
Dr
Konstantin Zloshchastiev
(Durban University of Technology)
27/06/2018, 14:00
Track G - Theoretical and Computational Physics
Oral Presentation
Wave equation with logarithmic nonlinearity find fruitful applications in different branches of physics - from nuclear physics and condensed-matter theory to particle physics, theory of quantum gravity and models of physical vacuum. In order to derive this nonlinearity from basic principles, we apply statistical mechanics and Madelung hydrodynamical presentation for an effective description of...
Vladimir Dzhunushaliev
(KRSU)
27/06/2018, 14:20
Track G - Theoretical and Computational Physics
Oral Presentation
We study Einstein-Klein-Gordon equations with a phantom, which is a scalar field with a negative sign in front of the kinetic energy term of its Lagrange density. Such equations can find applications in approximate cosmological models based on a low-energy limit of the superfluid vacuum theory. We show that they have spherically symmetric solutions, and perform their stability analysis.
Mr
Emile Meoto
(Department of Physics, University of South Africa)
27/06/2018, 14:40
Track G - Theoretical and Computational Physics
Oral Presentation
The knowledge of the hyperon-nucleon (YN) and hyperon-hyperon (YY) interactions is vital toward our deeper understanding of the nature of the nucleon-nucleon interaction. However, the direct study of the YN and YY interactions is practically impossible due to the limited or no data available. This is because the hyperon has a very short lifetime, making experiments with hyperon beams extremely...
