Gergely Fejős

associate professor

PhD (Eötvös Loránd University, Budapest, 2011)

Habilitation (Eötvös Loránd University, Budapest, 2023)

Biography:

POSITIONS:

2023 - : Associate professor, Eötvös Loránd University, Institute of Physics and Astronomy, Department of Atomic Physics.
2023 - 2024: Visiting researcher, RIKEN, Interdisciplinary Theoretical and Mathematical Sciences Program (iTHEMS).
2019 – 2023: Assistant Professor at Eötvös Loránd University, Institute of Physics, Department of Atomic Physics.
2018 – 2019: Postdoctoral Researcher at Keio University, Department of Physics, Topological Science Project.
2015 – 2018: Research Associate at Osaka University, Research Center for Nuclear Physics, Nuclear Theory Group.
2012 – 2015: Foreign Postdoctoral Researcher (FPR fellow) at RIKEN, Nishina Center, Quantum Hadron Physics Laboratory.
2011 – 2012: JSPS Postdoctoral Fellow at The University of Tokyo, Department of Physics, Theoretical Hadron Physics Group.
2010: Research Student, Université Paris 7 Diderot, APC laboratory.

QUALIFICATIONS:

2023: Habilitation in physics, Eötvös Loránd University.
Thesis: Functional renormalization group and its applications in quantum many body systems
2011: PhD in physics (summa cum laude) Eötvös Loránd University.
Thesis: Resummed perturbative series of scalar quantum field theories in 2PI formalism
2008: MSc in physics (with honors), Eötvös Loránd University.
Thesis: Renormalizability of partially resummed perturbative series in quantum field theory
2003: High-school graduation, ELTE Radnóti Miklós Gyakorlóiskola, Budapest.

RESEARCH INTEREST:

– Chiral and quark-hadron phase transitions
– Nuclear and quark matter at finite temperature and density
– Strongly coupled quantum field theories
– Superfluidity, superconductivity
– Topological phase transitions
– Renormalization group methods, functional techniques (2PI, FRG)
- Active matter

FELLOWSHIPS/AWARDS:

- Young researchers' excellence programme grant ("OTKA" FK22) of the Hungarian National Research, Development and Innovation Office (2022)
– The New National Excellence Programme Bolyai+ scholarship (2019, 2020, 2021)
– János Bolyai Research Fellowship of the Hungarian Academy of Sciences (2019-22)
– Postdoctoral excellence programme grant ("OTKA" PD18) of the Hungarian National Research, Development and Innovation Office (2018)
– Postdoctoral Fellowship of Japan Society for the Promotion of Science (2011)
– Erasmus fellowship (2010)
– Excellent student of the faculty, Eötvös Loránd University, Faculty of Science (2008)
– Republican Scholarship of Hungary (2007)

Links to associated scientific database profiles:

• Publications in MTMT
• Publications in ORCID
• Publications in ResearcherID
• Publications in Scopus
• Publications in Google Scholar

Selected publications of recent years:

1. G. Fejos and T. Hatsuda, "Order of the SU(N_f) x SU(N_f) transition via the functional renormalization group", Phys. Rev. D110, 016021 (2024).
2. G. Fejos and A. Patkos, "Thermal behavior of effective U_A(1) couplings in reflection of higher topological sectors", Phys. Rev. D109, 036035 (2024).
3. G. Fejos, T. Kimura and Zs. Szep, "Scale dependence of the Kondo interaction in the functional renormalization group formalism", Phys. Rev. B108, 165147 (2023).
4. G. Fejos, "Second order chiral phase transition in three-flavor quantum chromodynamics?", Phys. Rev. D105, L071506 (2022).
5. G. Fejos and A. Patkos, "Backreaction of mesonic fluctuations on the axial anomaly at finite temperature", Phys. Rev. D105, 096007 (2022).
6. G. Fejos, "Perturbative RG analysis of the condensate dependence of the axial anomaly in the three flavor linear sigma model", Symmetry 13(3), 488 (2021).
7. G. Fejos and A. Patkos, "Field dependence of the Yukawa coupling in the three flavor quark-meson model", Phys. Rev. D103, 056015 (2021).
8. M. Kobayashi, G. Fejos, C. Chatterjee and M. Nitta, "Vortex confinement transitions in the modified Goldstone model", Phys. Rev. Research 2, 013081 (2020).