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My name is Olesia Krupnitska and I am currently working as a Postdoctoral researcher
in
AGFKT
at the Institute of Theoretical Physics of the
Technical University of Braunschweig.
Research Interests
My research interests are in the area of frustrated quantum magnets, mainly antiferromagnetic Heisenberg models and related systems, lowdimensional frustrated systems and the corresponding solidstate realizations.
Among the numerical and analytical techniques that I have been using are: Numerical Diagonalization (Exact, Lanczos), ManyBody Pertubation Theory, JordanWignerFermionization.
Brief CV
• Academic Employment
since April 2022
Postdoctoral Researcher, Technical University of Braunschweig, Germany
April 2020  March 2021
Postdoctoral Researcher, Pavol Jozef Šafárik University in Košice, Slovakia
since November 2016
Researcher, Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, Lviv
• Education
2017
Ph.D. in Theoretical Physics, ICMP of NASU, Lviv, Ukraine
2013
M.S. in Theoretical Physics, Ivan Franko National University of Lviv, Ukraine
Publications
1 
J. Strečka, K. Karl'ová, and O. Krupnitska
On the failure of effectivefield theory in predicting a spurious spontaneous ordering and phase transition of Ising nanoparticles, nanoislands, nanotubes and nanowires,
Physica E 133, 114805 (2021).
DOI:
10.1016/j.physe.2021.114805

2 
J. Strečka, O. Krupnitska, and J. Richter
Investigation of entanglement measures across the magnetization process of a highly frustrated spin1/2 Heisenberg octahedral chain as a new paradigm of the localizedmagnon approach,
EPL 32, 30004 (2020).
DOI:
10.1209/02955075/132/30004

3 
O. Krupnitska
Frustrated quantum Heisenberg doubletetrahedral and octahedral chains at high magnetic fields,
Phys. Rev. B 102, 064403 (2020).
DOI:
10.1103/PhysRevB.102.064403

4 
J. Richter, O. Krupnitska, V. Baliha, T. Krokhmalskii, and O. Derzhko
Thermodynamic properties of Ba2CoSi2OCl2 in strong magnetic field: Realization of flatband physics in a highly frustrated quantum magnet,
Phys. Rev. B 97, 024405 (2018).
DOI:
10.1103/PhysRevB.97.024405

5 
O. Krupnitska, J. Richter, and O. Derzhko
Localizedmagnon chains and interchain interactions,
Acta Physica Polonica A 132, 1234 (2017).
DOI:
10.12693/APhysPolA.132.1234

6 
O. Derzhko, O. Krupnitska, B. Lisnyi, and J. Strečka
Effective lowenergy description of almost IsingHeisenberg diamond chain,
EPL 112, 370026 (2015).
DOI:
10.1209/02955075/112/37002

7 
O. Krupnitska
The influence of the Heisenberg exchange interaction anisotropy on magnetization process of the frustrated diamond chain in a strong magnetic field,
Ukraininan Journal of Physics 60, 1243 (2015).
DOI:
10.15407/ujpe60.12.1243

8 
J. Richter, O. Krupnitska, T. Krokhmalskii and O. Derzhko
Frustrated diamondchain quantum XXZ Heisenberg antiferromagnet in a magnetic field,
J. Magn. Magn. Mater. 379, 39 (2015).
DOI:
10.1016/j.jmmm.2014.11.082

9 
O. Derzhko, J. Richter, O. Krupnitska, and T. Krokhmalskii
The squarekagome quantum Heisenberg antiferromagnet at high magnetic fields: The localizedmagnon paradigm and beyond,
Low Temperature Physics 40, 513 (2014).
DOI:
10.1063/1.4881184

10 
O. Derzhko, J. Richter, O. Krupnitska, and T. Krokhmalskii
Frustrated quantum Heisenberg antiferromagnets at high magnetic fields: Beyond the flatband scenario,
Phys. Rev. B 88, 094426 (2013).
DOI:
10.1103/PhysRevB.88.094426

11 
O. Derzhko, J. Richter, and O. Krupnitska
Semiquantitative theory for highfield lowtemperature properties of distorted diamond spin chain,
Condensed Matter Physics (L'viv) 15, 43702 (2012).
DOI:
10.5488/CMP.15.43702

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