Recent Submissions

  • Phases of dipolar bosons in a bilayer geometry 

    Cinti, Fabio; Wang, Daw-Wei; Boninsegni, Massimo (American Physical Society, 2017)
    We study, by first-principles computer simulations, the low-temperature phase diagram of bosonic dipolar gases in a bilayer geometry as a function of the two control parameters, i.e., the in-plane density and the ...
  • Towards the improvement of spin-isospin properties in nuclear energy density functionals 

    Roca-Maza, X.; Colo, G.; Liang, H. Z.; Meng, J.; Ring, P.; Sagawa, H.; Zhao, P. W. (IOP Publishing, 2016)
    We address the problem of improving existing nuclear Energy Density Functionals (EDFs) in the spin-isospin channel. For that, we propose two different ways. The first one is to carefully take into account in the fitting ...
  • Towards atomic physics using spatially structured light 

    Webster, Jason (Stellenbosch : Stellenbosch University, 2018-12)
    ENGLISH ABSTRACT : Structured light has seen many applications in the fields of telecommunications, optical microscopy, and quantum information processing, however, few works exist that explore the interactions of ...
  • Mechanical properties of cells and modelling of structural instabilities in tissues 

    Azote, Somiealo (Stellenbosch : Stellenbosch University, 2018-12)
    ENGLISH ABSTRACT : Cells have inherent mechanical properties that can be modelled physically. Statistical physics approaches permit the understanding of deformation dependence by modelling the various elements of the ...
  • Experimental study of cluster effects in binary and ternary decays of low excited actinides 

    Malaza, Vusi David (Stellenbosch : Stellenbosch University, 2018-12)
    ENGLISH ABSTRACT : The experimental study of rare decay modes of ternary fission performed by the FOBOS group at the Joint Institute for Nuclear Research (JINR) in Dubna, Russia, revealed a new ternary decay mode of low ...
  • Superfluid filaments of dipolar bosons in free space 

    Cinti, Fabio; Cappellaro, Alberto; Salasnich, Luca; Macri, Tommaso (American Physical Society, 2017)
    We systematically investigate the zero temperature phase diagram of bosons interacting via dipolar interactions in three dimensions in free space via path integral Monte Carlo simulations with a few hundreds of particles ...
  • Examination of evidence for collinear cluster tri-partition 

    Pyatkov, Yu. V.; Kamanin, D. V.; Alexandrov, A. A.; Alexandrova, I. A.; Goryainova, Z. I.; Malaza, V.; Mkaza, N.; Kuznetsova, E. A.; Strekalovsky, A. O.; Strekalovsky, O. V.; Zhuchko, V. E. (American Physical Society, 2017)
    Background: In a series of experiments at different time-of-flight spectrometers of heavy ions we have observed manifestations of a new at least ternary decay channel of low excited heavy nuclei. Due to specific features ...
  • Snake fangs : 3D morphological and mechanical analysis by microCT, simulation, and physical compression testing 

    Du Plessis, Anton; Broeckhoven, Chris; Le Roux, Stephan G. (Oxford University Press, 2018)
    This Data Note provides data from an experimental campaign to analyse the detailed internal and external morphology and mechanical properties of venomous snake fangs. The aim of the experimental campaign was to investigate ...
  • Emerging translational variance : vacuum polarization energy of the 𝜙6 kink 

    Weigel, H. (Hindawi, 2017-07-30)
    We propose an efficient method to compute the vacuum polarization energy of static field configurations that do not allow decomposition into symmetric and antisymmetric channels in one space dimension. In particular, we ...
  • Simple models of three coupled PT-symmetric wave guides allowing for third-order exceptional points 

    Schnabel, Jan; Cartarius, Holger; Main, Jorg; Wunner, Gunter; Heiss, Walter Dieter (Czech Technical University--Prague, 2017-08)
    We study theoretical models of three coupled wave guides with a PT-symmetric distribution of gain and loss. A realistic matrix model is developed in terms of a three-mode expansion. By comparing with a previously postulated ...
  • Proportional crosstalk for the iThemba LABS clover detector 

    Noncolela, S. P.; Bucher, T. D.; Lawrie, E. A.; Dinoko, T. R. S.; Easton, J. L.; Erasmus, N.; Lawrie, J. J.; Mthembu, S. H.; Mtshali, W. X.; Shirinda, O.; Orce, J. N. (Jagiellonian University, 2017-03)
    Measurements of the proportional crosstalk were performed for the iThemba LABS segmented clover detector. More than 1000 crosstalk parameters were determined and a crosstalk correction algorithm was implemented successfully.
  • Chiral bands in 193Tl 

    Ndayishimye, J.; Lawrie, E. A.; Shirinda, O.; Easton, J. L.; Wyngaardt, S. M.; Bark, R. A.; Bvumbi, S. P.; Dinoko, T. R. S.; Jones, P.; Kheswa, N. Y.; Lawrie, J. J.; Majola, S. N. T.; Masiteng, P. L.; Negi, D.; Orce, J. N.; Papka, P.; Sharpey-Schafer, J. F.; Stankiewicz, M.; Wiedeking, M. (Jagiellonian University, 2017-03)
    Since the introduction of chirality in nuclei, the search for chiral candidates in different mass regions has been a hot topic for about two decades. At iThemba LABS, a new chiral symmetry region, the thallium isotopes with ...
  • Optical tweezers for advanced microscopy 

    Erasmus, Anneke (Stellenbosch : Stellenbosch University, 2018-03)
    ENGLISH SUMMARY: The integration of lasers into microscopy has enabled new areas of research and expanded existing ones. Not only can one now image samples to resolutions and contrast unheard of before lasers became ...
  • Investigating the photo-induced ultrafast insulator-metal phase transition in organic Cu(DCNQI)2 salts by ultrafast electron diffraction 

    Smit, Albert Bart (Stellenbosch : Stellenbosch University, 2018-03)
    ENGLISH SUMMARY: This work presents the structural dynamics of the organic crystal Cu(DCNQI)2 (DCNQI: dicyanoquinonediimine) as it undergoes a photo-induced insulator-to-metal (IM) transition. Cu(DCNQI)2, a radical ion ...
  • Point spread function engineering for fluorescence microscopy 

    Holinirina Dina Miora, Ratsimandresy (Stellenbosch : Stellenbosch University, 2018-03)
    ENGLISH SUMMARY: A tool for biological imaging is developed within this work. It consists of engineering the point spread function (PSF) of a fluorescent molecule or a nanoparticle emitter by modulating the phase of the ...
  • New developments in the nuclear binary cluster-core in the heavy nuclear region 

    Kaya, Boniface Dimitri Christel Kimene (Stellenbosch : Stellenbosch University, 2018-03)
    ENGLISH ABSTRACT : The atomic nucleus is a complex many-body interacting system, which exhibits a underlying correlated set of nucleon states. The cluster model is one of the most reliable models that predicts the strongly ...
  • Non-commutative quantum mechanics in 3-dimensional fuzzy space and its applications 

    Groenewald, Hendrikus Wilhelm (Stellenbosch : Stellenbosch University, 2018-03)
    ENGLISH SUMMARY: As the structure of space-time at very short length scales comparable to the Planck length remains a contentious issue, this study aims to determine whether non-commutative space-time would prove to be ...
  • Photophysics and photovoltaic application of direct heteroarylation derived isoindigo based copolymers 

    Tegegne, Newayemedhin (Stellenbosch : Stellenbosch University, 2018-03)
    ENGLISH SUMMARY: Environmental friendliness, ease of fabrication, low cost and mechanical flexibility make organic solar cells a potential future of renewable energy sources. The structure of organic materials such as ...
  • A microscopic description of elastic scattering from unstable nuclei within a relativistic framework 

    Yahya, Wasiu Akanni (Stellenbosch : Stellenbosch University, 2018-03)
    ENGLISH SUMMARY: In this dissertation, a microscopic study of proton elastic scattering from unstable nuclei at intermediate energies using relativistic formalisms is presented. We have employed both the original ...
  • Bayesian parameter estimation for discrete data spectra 

    Wang, Li (Stellenbosch : Stellenbosch University, 2017-12)
    ENGLISH ABSTRACT : Discrete spectra are ubiquitous in physics; for example nuclear physics, laser physics and experimental high energy physics measure integer counts in the form of particles in dependence of angle, ...

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