Gergely Fejős

Gergely Fejős

assistant professor

PhD (Eötvös Loránd University, Budapest, 2011)

Department of Atomic Physics

Room(s): Lágymányos Campus, Northern Building 3.85
Extension(s): +36-1-372-2500 / 1163
Email: uh.etle.ktt@sojef.ylegreg



2019 –: 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.


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.


– 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)


– The New National Excellence Programme Bolyai+ scholarship (2019, 2021, 2022)
– János Bolyai Research Fellowship of the Hungarian Academy of Sciences (2019-22)
– Postdoctoral Fellowship of the Hungarian National Research (“OTKA” PD18), 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:

Selected publications of recent years:

  1. G. Fejos, "Second order chiral phase transition in three-flavor quantum chromodynamics?", Phys. Rev. D105, L071506 (2022).
  2. G. Fejos and A. Patkos, "Backreaction of mesonic fluctuations on the axial anomaly at finite temperature", Phys. Rev. D105, 096007 (2022).
  3. 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).
  4. G. Fejos and A. Patkos, "Field dependence of the Yukawa coupling in the three flavor quark-meson model", Phys. Rev. D103, 056015 (2021).
  5. M. Kobayashi, G. Fejos, C. Chatterjee and M. Nitta, "Vortex confinement transitions in the modified Goldstone model", Phys. Rev. Research 2, 013081.
  6. G. Fejos and N. Yamamoto, "Functional renormalization group approach to color superconducting phase transition", JHEP 12 (2019) 069.
  7. G. Fejos and T. Hatsuda, "Flows of multicomponent scalar models with U(1) gauge symmetry", Phys. Rev. D 100, 036007 (2019).
  8. A. J. Beekman and G. Fejos, "Charged and neutral fixed points in the O(N)+O(N)-model with Abelian gauge fields", Phys. Rev. D 100, 016005 (2019).
  9. G. Fejos and A. Hosaka, "Axial anomaly and hadronic properties in a nuclear medium", Phys. Rev. D 98, 036009 (2018).
  10. G. Fejos and T. Hatsuda, "Renormalization group flows of the N-component Abelian Higgs model", Phys. Rev. D 96, 056018 (2017).
  11. G. Fejos and A. Hosaka, "Mesonic and nucleon fluctuation effects at finite baryon density", Phys. Rev. D 95, 116011 (2017).