A5084051719- Spectroscopy and Quantum Chemical Studies
- Photosynthetic Processes and Mechanisms
- Advancements in Battery Materials
- Spectroscopy and Laser Applications
- Photoreceptor and optogenetics research
- X-ray Spectroscopy and Fluorescence Analysis
- Multiferroics and related materials
- Advanced Condensed Matter Physics
- Advanced Fluorescence Microscopy Techniques
- Magneto-Optical Properties and Applications
- Advanced Chemical Physics Studies
- Advanced Thermodynamics and Statistical Mechanics
University of KwaZulu-Natal
2022-2023
National Institute for Theoretical Physics
2022
A wellknown approach to describe the dynamics of an open quantum system is compute master equation evolving reduced density matrix system. This plays important role in describing excitation transfer through photosynthetic light harvesting complexes (LHCs). The hierarchical equations motion (HEOM) was adapted by Ishizaki and Fleming [J. Chem. Phys.130, 234111 (2009)] simulate biological regime. We generate a set time-dependent observables that depict coherent propagation electronic...
Emission 57Fe Mössbauer spectroscopy (eMS), following the implantation of radioactive 57Mn+ ions, has been used to study temperature dependence hyperfine magnetic field at Fe sites in Ba-doped BiFeO3 (BFO) thin films. 57Mn β decays (t1/2 = 90 s) 14.4 keV state 57Fe, thus allowing online eMS measurements a selection sample temperatures during Mn implantation. The were performed on two film BFO samples, 88 nm and 300 thick, doped 15% with Ba ions. samples prepared by pulsed laser deposition...
One of the approaches used to solve for dynamics open quantum systems is hierarchical equations motion (HEOM). Although it numerically exact, this method requires immense computational resources solve. The objective here demonstrate whether models such as SARIMA, CatBoost, Prophet, convolutional and recurrent neural networks are able bypass requirement. We show successfully by first solving HEOM generate a data set time series that depict dissipative excitation energy transfer in...
There is an apparent mismatch between electron paramagnetic resonance and M\"ossbauer spectroscopy results on the charge spin states of dilute Fe impurities in NaCl; data have been interpreted terms high-spin ${\mathrm{Fe}}^{2+}$, while studies suggest low-spin ${\mathrm{Fe}}^{1+}$. In present study, substitutional NaCl LiF investigated with $^{57}\mathrm{Mn}\ensuremath{\rightarrow}^{57}\mathrm{Fe}$ emission spectroscopy. A scheme proposed which takes into account effects nearest-neighbor...
A well-known approach to describe the dynamics of an open quantum system is compute master equation evolving reduced density matrix system. This plays important role in describing excitation transfer through photosynthetic light harvesting complexes (LHCs). The hierarchical equations motion (HEOM) was adapted by Ishizaki and Fleming (J. Chem. Phys., 2009) simulate biological regime. We generate a set time dependent observables that depict coherent propagation electronic excitations LHCs...