We are the lattice gauge theory group at the Eotvos University in Budapest, part of the Department of Theoretical Physics at the Faculty of Science.

Currently there are nine members and we are seeking new ones. Positions are available for PhD students and postdocs for 2 - 4 years appointments. If you are interested please email Sandor Katz at katz@bodri.elte.hu or Daniel Nogradi at nogradi@bodri.elte.hu.

Our activities are and were funded by various funding agencies for which we are grateful, these include the Lendulet grant of the Hungarian Academy of Sciences, the OTKA-NF-104034 grant of OTKA and the EU Framework Programme 7 grant (FP7/2007-2013)/ERC No 208740.

Timetable of department common room.

Our primary interests are:

• Chiral symmetry restoration and deconfinement in QCD with Wilson fermions
• Finite chemical potential
• QCD hadron spectrum
• Eigenvalue distributions of the overlap Dirac operator
• Strongly interacting Higgs sector - strong dynamics
• Conformal gauge theories

Weekly ELFT seminars at the Department of Theoretical Physics

Location: 2nd floor, 2.54, Novobatzky room, 1117 Budapest, Pazmany Peter setany 1/a

If you'd like to receive seminar email announcements please write to nogradi@bodri.elte.hu

Time: Tuesdays at 14:15

See the archive for seminars since 2014.

• 26 September 2023, Zoltan Trocsanyi (Eotvos)

  Status of the superweak extension of the standard model

  The superweak force is a minimal, anomaly-free U(1) extension of the standard model, designed to explain the origin of (i) neutrino masses and mixing matrix elements, (ii) dark matter, (iii) cosmic inflation, (iv) stabilization of the electroweak vacuum and (v) leptogenesis. In this talk we discuss the phenomenological status of the model and provide viable scenarios for the physics of the items in this list. The talk is based on the following research articles on the arXiv: 1812.11189 (Symmetry), 1911.07082 (PRD), 2104.11248 (JCAP), 2104.14571 (PRD), 2105.13360 (J.Phys.G), 2204.07100 (PRD), 2301.07961 (JHEP), 2301.06621 (PRD), 2305.11931 (PRDL) and correspondence with the Budapest-Marseille-Wuppertal group, written in collaboration with S. Iwamoto, T.J. Karkkainen, I. Nandori, Z. Peli, K. Seller, Zs. Szep.

• 3 October 2023, Marton Kormos (BME)

  TBA

• 10 October 2023, Tamas Biro (Wigner)

  TBA

• 17 October 2023, Sergei Maydanyuk (Wigner)

  Synthesis of elements in compact stars in pycnonuclear fusion

  Purpose: In the proposed talk possibility of synthesis of nuclei in stellar matter of comact stars (white dwarfs, neutron stars) will be analyzed. Conditions of formation of compound nuclear system needed for synthesis of heavy nuclei in pycnonuclear reactions in compact stars are studied on quantum mechanical basis.

  Methods: As a method for study, new quantum method of high precision and tests (called as Multiple internal reflections) is used. This method is generalized for pycnoreactions in compact stars with new calculations of quasibound spectra and spectra of zero-point vibrations.

  Results: Peculiarities of the method are analyzed for reactions with isotopes of Carbon. The developed method takes into account continuity and conservation of quantum flux (describing pycnonuclear reaction) inside the full spacial region of reaction including nuclear region. High precision of calculations by the method will be demonstrated. This study gives appearance of new states (called as quasibound states), in which compound nuclear systems of Magnesium are formed with the largest probability. These states have not been studied yet by other researchers in study of synthesis of elements in stars. Energy spectra of zero-point vibrations and spectra of quasibound states are estimated with high precision for reactions with isotopes of Carbon.

  Conclusions: Probability of formation of compound nuclear system in quasibound states in pycnonuclear reaction is essentially larger than probability of formation of this system in states of zero-point vibrations studied by Zel'dovich and followers of that idea. Therefore, synthesis of more heavy nuclei of Magnesium from isotopes of Carbon is essentially more probable in quasibound states than in states of zero-point vibrations in compact stars.

• 24 October 2023, Gyula Fodor (Wigner)

  TBA

• 31 October 2023, Peter Van (Wigner)

  TBA

• 21 November 2023, Arpad Hegedus (Wigner)

  TBA

• 5 December 2023, Ors Legeza (Wigner)

  TBA

• 12 December 2023, Peter Athron (COEPP)

  TBA

Our group offers BSc/MSc diploma, PhD and TDK topics in Lattice Field Theory.

Please contact Sandor: katz@bodri.elte.hu or Daniel: nogradi@bodri.elte.hu in case you are interested.

Current topics include:

• QCD thermodynamics
• 2 and 4 dimensional CFT
• Beyond Standard Model

Since it is tricky to locate all papers by a large number of people whose names are not unique on inspire, you can try various search queries:

• Papers by Sandor Katz and Zoltan Fodor
• Papers by Sandor Katz and Gergely Endrodi
• Papers by Sandor Katz and Matteo Giordano
• Papers by Tamas Kovacs
• Papers by Daniel Nogradi

Our group has access to a number of high performance computer installations in Europe and also maintains several PC and GPU clusters on site in Budapest.

Our department is on the Buda side of the Danube very close to the Petofi Bridge, the address is Budapest 1117, Pazmany Peter setany 1/A:

The Department of Theoretical Physics is on the sixth floor opposite the Danube facing side of the building: