Theoretical Physics, Quantum Theory, High Performance Computing, Computer Graphics, Computer Networks
Postdoc, Experimental Particle Physics; University of Trento, Italy
Led a preliminary design and simulation study of a next-generation magnetic spectrometer demonstrator for a long-duration balloon mission over Antarctica, focused on cosmic-ray antimatter detection. Developed and integrated custom frameworks (Geant4, C++, C, Python) for charged-particle propagation in the atmosphere, magnetic field modeling and tracking performance, enabling detailed evaluation of the theoretical spectrometer performance and laying the groundwork for future spaceborne experiments.
Postdoc, Computational Biophysics; Trento Institute for Fundamental Physics and Applications, Italy
Applied transition-path theory to protein folding molecular dynamics (Gromacs, Python and MDAnalysis), resulting in a variational estimate of the committor function for fast-folding proteins. Automated production and analysis of ratchet-and-pawl Gromacs simulations on a cluster (Bash, Makefile). Co-lectured a course on molecular physics for biology and computer science students. Assisted in maintaining servers and computer cluster infrastructure (Proxmox, Debian, Wordpress, Bash, slurm).
PhD student, Theoretical Nuclear Physics; Johannes Gutenberg University of Mainz, Germany
Conducted a supervised research (Python, FORM, pen) on application of dispersion relations in quantum field theory to various hadronic processes, contributing to several highly-cited papers. Did 3 semesters of teaching assistance in quantum mechanics and basic quantum field theory.
Python developer at ScienceWISE project; Swiss Federal Institute of Technology Lausanne, Switzerland
Developed and monitored backend systems for ScienceWISE project (Django, MySQL, Python, Bash) improving data management and user experience.
PhD, Theoretical Physics; Johannes Gutenberg University of Mainz, Germany
Thesis: “Dispersion relations in two-photon hadronic processes”
Extended MSc study to a broader range of hadronic interactions, namely the timelike Compton scattering, the quarkonium – proton scattering, and the hadronic light-by-light scattering in relation to muon’s anomalous magnetic moment. The research resulted in multiple highly-cited papers.
MSc, Theoretical Physics; Taras Shevchenko National University of Kyiv, Ukraine
Thesis: “Causality constraints on the forward Compton scattering off the proton”
For the thesis, performed numerical calculations for the forward Compton scattering off the proton as a probe of its low-energy electromagnetic response structure, resulting in two published papers.
BSc, Theoretical Physics; Taras Shevchenko National University of Kyiv, Ukraine
Thesis: “Maximal abelian gauge fixing in SU(2) lattice gluodynamics with OpenCL”
Obtained a ground knowledge of general sections of physics, with extensive classes in mathematics and computational methods. Got basic experience of programming in C and C++. For the thesis, (re)implemented a subroutine for the maximal abelian gauge fixing of SU(2) Yang-Mills field on a lattice with OpenCL for GPUs.
Python: Deep knowledge of the core language features, extensive experience of scientific calculations with NumPy/SciPy (data fitting and numerical integration, statistics), visualization for publications, automation. Practical familiarity with building web apps on Flask + SQL. Interoperability with C and other languages.
C: Decent knowledge from undergrad on efficient numerical methods for solving linear algebra and calculus problems. Practiced OpenCL and CUDA usage for GPGPU calculations.
C++: Practical experience in building extensive Geant4 simulations from scratch.
FORM: Did symbolic algebra on particle scattering amplitudes for my PhD research.
Haskell: Loved it. Never used.
Familiar with Fortran, Pascal, Bash, Makefile etc.
Check out my Github gists for code samples: https://gist.github.com/neuton.
Co-lecturer, Introduction to Molecular Physics; University of Trento, Italy
Co-lectured a course on molecular physics for biology and computer science students, from the ground-up to the basics of quantum theory of molecular interactions. Composed lectures on the introductory hands-on mixture of multivariable calculus, mathematical physics and quantum mechanics.
Teaching assistant, Quantum Field Theory; Johannes Gutenberg University of Mainz, Germany
Led classes on solving exercises on introductory quantum field theory. Graded homeworks and final exam.
Teaching assistant, Quantum Mechanics; Johannes Gutenberg University of Mainz, Germany
Supervised creation and assembly of exercises and final exam for undergrad physics students for the introductory quantum mechanics course.
Teaching assistant, Advanced Quantum Mechanics; Johannes Gutenberg University of Mainz, Germany
Led classes on solving exercises on relativistic many-body theory / quantum field theory and graded students’ homeworks.
O. Gryniuk, S. Joosten, Z.-E. Meziani, M. Vanderhaeghen,
“Υ photo-production on the proton at the Electron-Ion Collider”
Phys. Rev. D 102 (2020) no.1, 014016 (e-Print: arXiv:2005.09293 [hep-ph]).
A. Gérardin, J. Green, O. Gryniuk, G. von Hippel, H. B. Meyer, V. Pascalutsa, H. Wittig,
“Hadronic light-by-light scattering amplitudes from lattice QCD versus dispersive sum rules”
Phys. Rev. D 98 (2018) no.7, 074501 (e-Print: arXiv:1712.00421 [hep-lat])
O. Gryniuk, M. Vanderhaeghen,
“Accessing the real part of the forward J/ψ-p scattering amplitude from J/ψ photoproduction on protons around threshold”
Phys. Rev. D 94 (2016) no.7, 074001 (e-Print: arXiv:1608.08205 [hep-ph])
O. Gryniuk, F. Hagelstein, V. Pascalutsa,
“Evaluation of the forward Compton scattering off protons: II. Spin-dependent amplitude and observables”
Phys. Rev. D 94 (2016) no.3, 034043 (e-Print: arXiv:1604.00789 [nucl-th])
O. Gryniuk, F. Hagelstein, V. Pascalutsa,
“Evaluation of the forward Compton scattering off protons: Spin-independent amplitude”
Phys. Rev. D 92 (2015) 074031 (e-Print: arXiv:1508.07952 [nucl-th])
J. Green, O. Gryniuk, G. von Hippel, H. B. Meyer, V. Pascalutsa,
“Lattice QCD calculation of hadronic light-by-light scattering”
Phys. Rev. Lett. 115 (2015) 22, 222003 (e-Print: arXiv:1507.01577 [hep-lat])
R. Iuppa, O. Gryniuk, D. Mascione, A. Perinelli,
“Sensitivity studies and technological advancements for balloon-borne demonstrators of direct antimatter detection”
N. Asmussen et al.,
“Hadronic light-by-light scattering contribution to the muon g – 2 on the lattice”
EPJ Web Conf. 179 (2018) 01017 (e-Print: arXiv:1801.04238 [hep-lat])
I. V. Anikin et al.,
“Nucleon and nuclear structure through dilepton production”
Acta Phys. Polon. B 49 (2018) 741 (e-Print: arXiv:1712.04198 [nucl-ex])
A. Gerardin, J. Green, O. Gryniuk, G. von Hippel, H. B. Meyer, V. Pascalutsa, H. Wittig,
“Light-by-light forward scattering amplitudes in Lattice QCD”
EPJ Web Conf. 175 (2018) 06030 (e-Print: arXiv:1710.09359 [hep-lat])
J. Green, N. Asmussen, O. Gryniuk, G. von Hippel, H. B. Meyer, A. Nyffeler, V. Pascalutsa,
“Direct calculation of hadronic light-by-light scattering”
PoS LATTICE 2015 (2016) 109 (e-Print: arXiv:1510.08384 [hep-lat])
Good written and verbal communication in English (C1) and Ukrainian (native speaker), basics of German (A1) and Italian (A2)
Regularly donating to the Ukrainian army and invite everyone to do so: https://savelife.in.ua/en/donate-en