Conveners
Theoretical and Computational Physics: High Energy Theories and DFT
- Thomas Konrad (UKZN)
Theoretical and Computational Physics: Quantum session
- Alan Cornell (University of Johannesburg)
Theoretical and Computational Physics: Gravity and machine learning
- Alan Cornell (University of Johannesburg)
Theoretical and Computational Physics: Quantum related
- Azwinndini Muronga (Nelson Mandela University)
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
The evolution equations of all supersymmetric and soft-terms are derived for the two-loop renormalisation group equations (RGEs) in a five-dimensional MSSM compactified on a $S_1/Z_2$ to yield the standard four space-time dimensions. Different possibilities can be discussed, however, we shall consider the limiting case of superfields where the Standard Model matter fields are restricted to the...
Quasinormal modes (QNMs), the damped oscillations in spacetime that emanate from a perturbed body as it returns to an equilibrium state, have served for several decades as a theoretical means of studying n-dimensional black hole spacetimes. These black hole QNMs can in turn be exploited to explore beyond the Standard Model (BSM) scenarios and quantum gravity conjectures. With the...
The Ultra-relativistic Quantum Molecular Dynamic model (UrQMD 3.3) is a microscopic model based on a phase space description of nuclear reaction and it can now support the Large Hadron Collider energies (LHC) of up to a $\sqrt(s_{nn}$) = 14 TeV. This model is used to simulate the ultra-relativistic heavy-ion collisions of a finite matter between two Pb+Pb and Au+Au collisions at an energy of ...
𝟏𝑴𝒂𝒃𝒆𝒃𝒂, 𝑲.𝑻.
𝟏𝑷𝒓𝒐𝒇. 𝑺𝒊𝒕𝒉𝒐𝒍𝒆, 𝑴.𝑬. 𝟐𝑫𝒓. 𝑴𝒐𝒅𝒊𝒃𝒂, 𝑹.
- Mabeba, K.T. Sefako Makgatho health sciences university school of science and
technology department of physics P.O. Box 218 Medunsa 0204 email address:
mabebak.2@gmail.com. - Prof. Sithole, M.E. Sefako Makgatho health sciences university school of science and technology department of physics P.O. Box 218 Medunsa 0204 email...
Multiparticle correlations measurements in even the smallest collision systems are consistent with predictions from viscous relativistic hydrodynamics calculations. However, these hydrodynamics calculations use a continuum extrapolated---i.e. infinite volume---equation of state. For the modest temperature probed in these small collisions, the controlling dimensionless product of the...
We provide a broad introduction to lattice QCD, which is a non-perturbative technique used to study strongly coupled QCD. Lattice QCD is a regularisation of QCD, where Euclidean space-time is discretised on a hypercubic lattice with spacing $a$, and the quark fields are placed on sites while gauge fields are placed on the links between these sites, then their interactions are simulated in...
The quantity of various particles reported in relativistic heavy-ion collision research is consistent with the notion that they attain thermal equilibrium at temperatures substantially higher than those at which they kinetically freeze-out, which is a remarkable conclusion. This study attempts to explain this phenomenon by using statistical thermal models based on statistical mechanics...
High-dimensional quantum key distribution has become a viable alternative towards bringing the quantum key distribution (QKD) technology closer to its wide adoption owing to its capability of tolerating high error rate and high photon information capacity. In this work, we propose of measurement device independent QKD protocol which exploits the polarization state of a biphoton to encode...
Nonlinear optical processes can offer exciting applications in quantum schemes, e.g., spontaneous parametric down-conversion is used as a source of entangled photons. However, most nonlinear optical processes are only considered classically and lack the required theoretical framework to describe what occurs on the quantum level.
Previously, a quantum derivation of difference-frequency...
Measurement-Based Quantum Network Coding (MBQNC) is a recently introduced short-depth protocol for simultaneous transmission of quantum information through a bottleneck in a quantum network. MBQNC is studied here in the context of quantum information transfer within a noisy superconducting processor. We adapt the protocol to run on the new IBM Q falcon superconducting quantum processors by...
We present a new verification scheme for universal quantum computers that yields the number of qubits and an error probability which measures the noise present in the system. The new scheme is based on detecting the standard deviation of the meta probability distribution of output values for an arbitrary qubit probed by random quantum gates. The results are generated directly from output...
Decades of astronomical observations have shown that the standard model of cosmology based on General Relativity - the closest we have to a standard theory of gravitation - does not adequately describe our universe without the ad hoc introduction of dark matter and dark energy to late-time cosmology and inflation to early-universe cosmology. This certainly has created dilemmas in cosmology,...
There are models of classical (non-quantum) gravity that reconcile it with quantum mechanics [1] by simulating gravitational interaction along the lines of local operations with classical communication (LOCC). However, a way to prove that gravity necessarily is quantised would be to carry out an experiment in which gravity generates entanglement between quantum systems, since this is not...
Recently, some authors have considered the quantum spectrum of black holes . This consideration is extended to tachyonic black holes in a brane-anti-brane system. In this study, black holes are constructed from two branes which are connected by a tachyonic tube. As the branes come closer to each other, they evolve and make a transition to thermal black branes. It will be shown that the...
The core-collapse supernovae(CCSN) can be described as an explosion that occurs when a massive star ($\sim 8\times M_{\odot}$) dies, where $\ M_{\odot}$ is the astronomical symbol representing solar mass. The later supernovae(SN) explosion yields to a shock wave distribution. In this study, the computations specifically looking at the shock wave (or simply shock) distribution were performed....
As the volume of data recorded from systems increases, there is a need to effectively analyse this data to gain insights about the system. One such analysis requirement is anomaly detection. Data-driven approaches such as machine learning, are by construction, able to learn (to some degree) the underlying representations in the data and consequently identify a hyperplane which separates the...
Quantum systems can be controlled by other quantum systems in a reversible way, without any information leaking to the outside of the system–controller compound. Such coherent quantum control is deterministic, is less noisy than measurement-based feedback control, and has potential applications in a variety of quantum technologies, including quantum computation, quantum communication and...
We study the spatiotemporal and particle number degrees of freedom of light in the framework of a new quantum optical formalism based on a generalised quadrature basis [1, 2]. This is an orthogonal complete basis for all quantum optical states. It gives rise to a description in terms of Wigner functionals that can incorporate all spatiotemporal degrees of freedom without approximations nor...
Measurement-based feedback control works by measuring the system and estimating its properties, and providing feedback in order to reach the desired state. This work investigates the dynamics of a system under continuous measurement and feedback. It turns out that feedback plays a limited role in determining the steady state of a particle in a harmonic trap. Instead, feedback can be used to...
There has been much discussion about quantum entanglement with respect to relativistic frames in the recent literature. By now, the violations of the original Bell’s inequality as well as the updated CHSH inequality (as proposed by Clauser et el.) has been well confirmed by experiment. However, this only applies when the relativistic effects are small enough that they can be neglected. As...
Open quantum walks (OQWs) have been introduced as a new type of quantum walks that are entirely driven by the dissipative interaction with external environments and are defined in terms of discrete completely positive trace-preserving maps on graphs [1-3]. In this contribution, we discuss a possible experimental scheme for the implementation of OQWs. The scheme is based on a model consisting...
Relativistic fluid dynamics model is a useful tool in describing matter produced in heavy ion collisions at particle accelerators such as the Large Hadron Collider (LHC) and in astrophysical processes such as the core-collapse supernovae and neutron star collisions.
For the past two decades it has become clear that to describe transient phenomena in such processes using dissipative fluid...
We conducted theoretical investigation of the structural and electronic properties of Vanadium- functionalized graphene and its effect on hydrogen storage and H2S sensing. Vanadium (V) was an effective addition required for enhancing the properties of graphene sheet. In fact, we found that up to four H2 molecules could be adsorbed by V-functionalized graphene with an average binding energy...
Late 2019, the world started experiencing the advent of a new deadly disease (Coronavirus). Coronaviruses are widespread in humans and several other vertebrates and cause respiratory, enteric, hepatic, and neurologic diseases. There was relatively little information on the corona virus; consequently, the world was thrown into a state of pandemic as the virus spread across all continents with...
Linear optical spectroscopy is a crucial analytical tool in biology, chemistry, materials science, molecular physics, and various other disciplines, but is hard to simulate exactly—even for small model systems. In this presentation we give an overview of different linear spectroscopy techniques and briefly discuss approximate methods and an exact method for the calculation of linear spectra....
