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. Since 2011 we are an NVIDIA GPU Research Center.

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 {at} bodri {dot} elte {dot} hu or Daniel Nogradi at nogradi {at} bodri {dot} elte {dot} hu.

Our activities are funded by the Lendulet grant of the Hungarian Academy of Sciences and by the OTKA-NF-104034 grant of OTKA.

We are also grateful to our past funding agencies, the EU Framework Programme 7 grant (FP7/2007-2013)/ERC No 208740.

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 seminars of the Department of Theoretical Physics

Location: 2nd floor, 2.54, Novobatzky room

Time: Wednesdays at 14:15

See the archive for seminars in past years.

• 7 September 2016, Daniel Barna (Wigner)

  Magyar reszvetel a jovo 50-50 TeV-es gyorsitojanak fejleszteseben

  Az eloadasban szo lesz az FCC-rol (Future Circular Collider), a CERN kovetkezo generacios gyorsito terverol; arrol, hogy hogyan lehet megszabadulni az egyenkent 8.4 GJ energiat tarolo nyalaboktol (ami 23 darab 200 m hosszu, 150 km/h sebessegu TGV vonat mozgasi energiajanak felel meg); az LHC es az FCC nyalabtemetojerol; szupravezetokrol, szupravezeto magnesekrol es szupravezeto arnyekolasrol; specialis kicsatolo magnesekrol. Minderrol annak a Budapest-CERN kozos projektnek a kereteben fogok beszelni, ami iden indult, es a fenti problemakra keres megoldast, es fejleszt prototipusokat.

• 21 September 2016, Matteo Giordano (Eotvos)

  Landau levels in QCD in an external magnetic field

  The effect of an external magnetic field on strongly interacting matter is relevant for important problems in particle physics and cosmology, such as heavy ion collisions, neutron stars, and the evolution of the early universe. In this talk I will first briefly review the current knowledge on this topic, as obtained by means of first-principles lattice numerical calculations. I will then discuss in detail the issue of Landau levels in QCD, showing preliminary numerical results obtained on the lattice. In particular, I will show that, after turning on the strong interactions, only the lowest Landau level remains of the whole Landau level structure. I will then discuss how much of the observed effects of a magnetic field can be explained in terms of the lowest Landau level. Our results can be used to test the validity of low-energy models of QCD that make use of the lowest-Landau-level approximation.

• 28 September 2016, Gergely Fejos (Osaka University)

  Thermal properties and evolution of the axial anomaly for 2+1 flavors

  I will be talking about the thermal evolution of the axial anomaly of QCD in terms of effective theories with 2+1 flavors. It will be shown that mesonic fluctuations are of great importance from the point of view of the thermal behavior of the 't Hooft determinant term. Results indicate that fluctuations strengthen the axial anomaly at finite temperature and it does not vanish at the critical point. The phenomenon has been found to have significance in the thermal properties of the mesonic spectrum, especially concerning the eta - eta' system. Analysis of the spectrum and the anomaly in nuclear medium will also be discussed.

• 5 October 2016, Sandor Katz (Eotvos)

  TBA

  TBA

• 12 October 2016, Zoltan Kokenyesi (Eotvos)

  TBA

  TBA

• 2 November 2016, Istvan Szecsenyi (Durham)

  TBA

  TBA

• 16 November 2016, Arpad Hegedus (Wigner)

  TBA

  TBA

• 7 December 2016, Bence Kocsis (Eotvos)

  TBA

  TBA

• 14 December 2016, Csaba Torok (Eotvos)

  TBA

  TBA

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

Please contact Sandor: katz {at} bodri {dot} elte {dot} hu
or Daniel: nogradi {at} bodri {dot} elte {dot} hu
in case you are interested.

Current topics include:

• QCD thermodynamics
• SU(N) gauge theory with topological lattice action
• O(3) non-linear sigma model with topological term
• Beyond Standard Model - technicolor

• Can the Higgs Impostor Hide Near the Conformal Window?.
  By Zoltan Fodor, Kieran Holland, Julius Kuti, Daniel Nogradi, Christopher Schroeder, Chik Him Wong.
  10.1142/9789814566254_0002.
  
  
• Freeze-out parameters from electric charge and baryon number fluctuations: is there consistency?.
  By S. Borsanyi, Z. Fodor, S.D. Katz, S. Krieg, C. Ratti, K.K. Szabo.
  [arXiv:1403.4576 [hep-lat]].
  
  
• Freeze-out parameters: lattice QCD meets heavy-ion experiments.
  By Sz. Borsanyi, Z. Fodor, S.D. Katz, S. Krieg, C. Ratti, K. Szabo.
  PoS QCD-TNT-III (2014) 033.
  
  
• The chiral condensate from the Dirac spectrum in BSM gauge theories.
  By Zoltan Fodor, Kieran Holland, Julius Kuti, Daniel Nogradi, Chik Him Wong.
  [arXiv:1402.6029 [hep-lat]].
  
  
• Charmonium spectral functions from 2+1 flavour lattice QCD.
  By Szabolcs Borsanyi, Stephan Durr, Zoltan Fodor, Christian Hoelbling, Sandor D. Katz, Stefan Krieg, Simon Mages, Daniel Nogradi et al..
  [arXiv:1401.5940 [hep-lat]].
  10.1007/JHEP04(2014)132.
  JHEP 1404 (2014) 132.
  
  
• Local CP-violation and electric charge separation by magnetic fields from lattice QCD.
  By G.S. Bali, F. Bruckmann, G. Endrodi, Z. Fodor, S.D. Katz, A. Schafer.
  [arXiv:1401.4141 [hep-lat]].
  10.1007/JHEP04(2014)129.
  JHEP 1404 (2014) 129.
  
  
• Can a light Higgs impostor hide in composite gauge models?.
  By Zoltan Fodor, Kieran Holland, Julius Kuti, Daniel Nogradi, Chik Him Wong.
  [arXiv:1401.2176 [hep-lat]].
  
  
• Full result for the QCD equation of state with 2+1 flavors.
  By Szabocls Borsanyi, Zoltan Fodor, Christian Hoelbling, Sandor D. Katz, Stefan Krieg, Kalman K. Szabo.
  [arXiv:1309.5258 [hep-lat]].
  10.1016/j.physletb.2014.01.007.
  Phys.Lett. B730 (2014) 99-104.
  
  

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 primary resource is a 128 node cluster with two NVIDIA GTX 275 cards in each node, hosted in Budapest. There is also a 60 node cluster with one NVIDIA GTX 8800 card per node.

In addition we also have access to the Juropa cluster and the BlueGene/P installation in Forschungszentrum Juelich, Germany.

Our collaboriation with the University of Wuppertal, Germany also allows us to use several PC and GPU clusters there.

In case you are interested you can see a map of GPU cluster installations throughout the world dedicated to Lattice Gauge Theory.

You will most likely stay at the Peregrinus hotel in the downtown area of Pest.

The simplest way to get to/from your hotel from/to the airport is by taxi. The fare should be around 30 euros. Uber also works in Budapest :)

Our department is on the Buda side of the Danube very close to the Petofi Bridge and it is about a 30-35 minutes walk from the hotel:

You exit your hotel, walk past the Great Market Hall (definitely worth a closer look if you have about half an hour or an hour!) and the Corvinus University, cross the Danube on the Szabadsag Bridge and walk South. You will pass the Budapest University of Technology and the Petofi Bridge and our building will be a redish seven-story building on the right. The Department of Theoretical Physics is on the first floor on the Danube facing side of the building: