Takács, Gábor

Professor

Head
BME "Momentum" Statistical Field Theory Research Group
BME "Lendület" Statisztikus Térelméleti Kutatócsoport
Office: 
F III. 1F/2.
Email: 
takacsg (at) eik.bme.hu
Telephone: 
+36 1 463 4110

Teaching

BSc courses

(in Hungarian)

Electrodynamics 1 (BMETE15AF25)

Electrodynamics 1 (BMETE15AF26, exercise class)

Electrodynamics 2 (BMETE15AF34)

Electrodynamics 2 (BMETE15AF35, exercise class)

MSc courses

(in English)

Particle Physics (BMETE15MF43)

Quantum Field Theory (BMETE15MF46)

Statistical Field Theory (BMETE15MF39)

Advanced Quantum Field Theory (BMETE15MF57)

Graduate students

Ferenc Wágner

(joint supervision with Z. Bajnok and L. Palla)

1999-2000 MSc (Eötvös University, Budapest)

2000-2003 PhD (Eötvös University, Budapest, graduated in 2010)

Márton Kormos

2002-2003 MSc (Eötvös University, Budapest)

2003-2007 PhD (Eötvös University, Budapest)

Balázs Pozsgay

2005-2006 MSc (Eötvös University, Budapest)

2006-2009 PhD (Eötvös University, Budapest)

Miklós Szőts

2006-2007 MSc (Eötvös University, Budapest)

György Fehér

2009-2011 MSc (Budapest University of Technology and Economics)

Anna J. Zsigmond

2009-2010 BSc (Eötvös University, Budapest)

Máté Lencsés

2010-2011 MSc (Budapest University of Technology and Economics)

2011-2015 PhD (Eötvös University, Budapest)

István Szécsényi

2010-2013 PhD (Eötvös University, Budapest, graduated in 2017)

Tamás Pálmai

2011-2012 Part-time graduate student (Budapest University of Technology and Economics, PhD supervisor: B. Apagyi)

Márton Mestyán

2013-2015 MSc (Budapest University of Technology and Economics, supervision shared with B. Pozsgay)

Dávid Horváth

2014-          PhD (Budapest University of Technology and Economics)

Tibor Rakovszky

2015-2016 MSc student (Budapest University of Technology and Economics)

Levente Pristyák

2016-2017 BSc (Budapest University of Technology and Economics) 

Octavio Pomponio

2017-2018 MSc (Bologna University)

Dávid Szász-Schagrin

2018-        BSc (Budapest University of Technology and Economics)

Selected publications

1

Kormos M, Collura M, Takacs G, Calabrese P

Real-time confinement following a quantum quench to a non-integrable model

NATURE PHYSICS 13: pp. 246-249. (2017)

2

M Mestyán, B Pozsgay, Takacs G, MA Werner

Quenching the XXZ spin chain: quench action approach versus generalized Gibbs ensemble

JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT 2015:(4) Paper P04001. 35 p. (2015)

3

Pozsgay B, Mestyan M, Werner MA, Kormos M, Zarand G, Takacs G

Correlations after Quantum Quenches in the XXZ Spin Chain: Failure of the Generalized Gibbs Ensemble

PHYSICAL REVIEW LETTERS 113:(11) Paper 117203. 5 p. (2014)

4

Sotiriadis S, Takacs G, Mussardo G

Boundary state in an integrable quantum field theory out of equilibrium

PHYSICS LETTERS B 734: pp. 52-57. (2014)

5

Feher GZ, Palmai T, Takacs G

Sine-Gordon multisoliton form factors in finite volume

PHYSICAL REVIEW D85:(8) Paper 085005. 12 p. (2012)

6

Pozsgay B, Takacs G

Form factors in finite volume I: Form factor bootstrap and truncated conformal space

NUCLEAR PHYSICS B 788:(3) pp. 167-208. (2008)

7

Pozsgay B, Takacs G

Form factors in finite volume II: Disconnected terms and finite temperature correlators

NUCLEAR PHYSICS B 788:(3) pp. 209-251. (2008)

8

Feverati G, Ravanini F, Takacs G

Non-linear integral equation and finite volume spectrum of sine-Gordon theory

NUCLEAR PHYSICS B 540:(3) pp. 543-586. (1999)

9

Feverati G, Ravanini F, Takacs G

Scaling functions in the odd charge sector of sine-Gordon massive Thirring theory

PHYSICS LETTERS B 444:(3-4) pp. 442-450. (1998)

10

Feverati G, Ravanini F, Takacs G

Truncated conformal space at c=1, nonlinear integral equation and quantization rules for multi-soliton states

PHYSICS LETTERS B 430:(3-4) pp. 264-273. (1998)

Lectures

Invited talks at international conferences/workshops/schools

2018

Quantum Paths

27 June 2018, Erwin Schrödinger Institute, Vienna, Austria

Title: Correlation functions of the quantum sine-Gordon model in and out of equilibrium

2018

Hamiltonian methods in strongly coupled Quantum Field Theory

8-12 January 2018, IHES, Bures-sur-Yvette, France

Title: Quenches in quantum field theory

2017

Wonders of Broken Integrability

2-6 October 2017, Simons Center for Geometry and Physics, SUNY Stony Brook, NY USA

Title: Quenches in quantum field theory

2017

Integrability in Low-Dimensional Quantum Systems

26 June - 21 July 2017, MATRIX Mathematical Research Institute, Melbourne/Creswick, Australia

Title: Quenches in quantum field theory

2016

New Trends in Low-Dimensional Physics: Quantum Integrability and Applications

1 - 15 Sep 2016, Institute of Physics, Chinese Academy of Sciences, Beijing, China

Title: Particle formation and ordering in strongly correlated fermionic systems: Solving a model of quantum chromodynamics

2016

Conformal Field Theories and Renormalization Group Flows in Dimensions d>2  

23 May - 8 July 2016, The Galileo Galilei Institute for Theoretical Physics, Florence, Italy

Title: Truncated Hamiltonian approach to quantum quenches in field theory

2015

Beyond integrability: The mathematics an physics of integrability and its breaking in low-dimensional strongly correlated quantum phenomena  

13-17 July 2015, Centre de Recherches Mathematiques, Montreal, Canada

Title: Quenching the XXZ spin chain: quench action approach versus generalized Gibbs ensemble

2015

Lecture Series on Quantum Quenches   Intensive PhD course,

29 June - 9 July 2016, 13x2 lectures Department of Physics, University of Bologna, Bologna, Italy

2015

Back to the Bootstrap 2015  

18-29 May 2015, Weizmann Institute of Science, Rehovot, Israel

Title: Truncated conformal space approach: Numerical and analytical RG techniques

2014

Quantum Integrability, Conformal Field Theory and Topological Quantum Computation  

23 March-6 April 2014, International Institute of Physics, Natal, Brazil

Title: Form factors in the presence of integrable defects

2014

Advances in Strong-Field Electrodynamics (lecture series)  

3 - 6 Feb 2014, ELTE Bolyai College, Budapest, Hungary

Title: The Casimir effect and the physical vacuum

2012

The Beauty of Integrability: low-dimensional Physics, Statistical Models and Solitons  

15-28 July 2012, International Institute of Physics, Natal, Brazil

Title: Excited state g-functions from the Truncated Conformal Space

2010

Finite-size technology in low dimensional quantum field theory (V)

27 June-17 July 2010, Centro de Ciencias de Benasque Pedro Pascual, Benasque, Spain

Title: Systematic perturbative expansion for nonintegrable quantum field theories

2008

APCTP Focus Program: Finite-size technology in low dimensional quantum field theory (IV)

25 June-15 July 2008, Asia-Pacific Center for Theoretical Physics, Pohang, Korea

Title: Form factors in finite volume and finite temperature correlators

2006

4th EUCLID Annual Meeting on Integrable Models and Applications: from Strings to Condensed Matter  

11-15 September 2006, École Normale Supérieure, Lyon, France

Title: Characterization of resonances using finite size effects

2005

APCTP Focus Program: Finite-size technology in low dimensional quantum field theory (II)  

20 June-9 July 2005, Asia-Pacific Center for Theoretical Physics, Pohang, Korea

Title: Casimir force between planes as a boundary finite size effect

2003

1st EUCLID Annual Meeting on Integrable Models and Applications: from Strings to Condensed Matter  

15-20 September 2003, Galileo Galilei Institute for Theoretical Physics, Florence, Italy

Plenary talk: On the perturbative formulation of quantum field theory with boundary

2001

NATO Advanced Research Workshop on Statistical Field Theories

18-23 June 2001, Villa Olmo (Como, Italy)

Title: Sine-Gordon with Neumann boundary condition: the spectrum of boundary states

2000

4th Informal UK Meeting on Integrable Systems and Conformal Field Theory

24-25 March 2000, International Centre for Mathematical Sciences, Edinburgh, UK

Title: Nonlinear Integral Equations and Integrable Models


Some recent invited seminars and colloquia

2018

Seminar, 22nd March 2018, INFN Sezione di Bologna, Universitá di Bologna

Title: Dynamical confinement and Gibbs mixing entropy in non-equilibrium quantum systems

2017

Seminar, 26th May 2017 Department of Physics, University of Ljubljana

Title: Dynamical confinement in non-equilibrium quantum systems

2017

Ortvay Colloquium, Institute of Physics, Eötvös University, Budapest

2nd March 2017

Title: Dynamical confinement in non-equilibrium quantum systems

2017

String Theory Seminar, Department of Physics, Queen Mary University of London

2nd February 2017 

Title: Particle formation and ordering in strongly correlated systems: a 1+1D model of QCD

2016

Particle Physics Seminar, Institute of Physics, Eötvös University, Budapest

9th March 2016 

Title: Particle Formation and Ordering in Strongly Correlated Fermionic Systems: Solving a Model of Quantum Chromodynamics

2015

Particle Physics Seminar, Institute of Physics, Eötvös University, Budapest

4th March 2015 

Title: Form factor relocalisation and interpolating renormalisation group flows from the staircase model

2015

HAS Institute of Nuclear Physics, Debrecen

27th April 2015

Title: Correlations after quantum quenches in the XXZ spin chain: Failure of the Generalized Gibbs Ensemble

2015

HAS Rényi Institute of Mathematics, Budapest

24th April/8th May, 2015

Title: An Introduction to WZNW conformal field theories I-II

2015

Dublin Area Theoretical Physics Colloquium School of Mathematics, Trinity College Dublin,

4th February 2015

Title: Form factors in finite volume

2015

Scuola Internazionale Superiore di Studi Avanzati (SISSA), Trieste Joint ICTP/SISSA Seminar on Statistical Field Theory,

30th January 2015

Title: Form factor relocalisation and interpolating renormalisation group flows from the staircase model

2014

Nanophysics Seminar Eötvös University,

15th December, 2014

Title: Correlations after quantum quenches in the XXZ spin chain: Failure of the Generalized Gibbs Ensemble

2014

CERN TH String Theory Seminar, Theory Division, CERN, Geneva, Switzerland

20th May 2014

Title: TCSA for beginners

2013

Particle Physics Seminar,  Institute of Physics, Eötvös University, Budapest

20th March 2013

Title: Asymptotic scattering of the quantum Potts spin chain and the continuum limit

2012

Institute for Theoretical Physics (ITFA), University of Amsterdam

12th June 2012

Title: Form factors in finite volume and finite temperature correlators

2012

Department of Mathematics, King's College London

1st November 2012

Title: Finite temperature correlators in integrable QFT

2012

North British Mathematical Physics Seminar, Durham University

27th October 2012

Title: Finite temperature correlators in integrable QFT

2012

HAS Institute of Nuclear Physics, Debrecen 24th April 2012

Title: Form factors in finite volume and finite temperature correlators

2012

Scuola Internazionale Superiore di Studi Avanzati (SISSA),

Trieste Joint ICTP/SISSA Seminar on Statistical Field Theory

27th March 2012

Title: Form factors in finite volume: recent developments

2009

Mathematical Research Seminar

Centre for Mathematical Science, City University London  

31st March 2009

Title: Solitons and topological sectors in nonintegrable quantum field theories

2009

Scuola Internazionale Superiore di Studi Avanzati (SISSA),

Trieste Joint ICTP/SISSA Seminar on Statistical Field Theory

20th January 2009

Title: Form factors in finite volume and finite temperature correlators

2006

Université Pierre et Marie Curie - Paris 6 (Jussieu)

Laboratoire de Physique Théorique et Hautes Énergies

24th November 2006

Title: Correlation functions of boundary operators: the boundary form factor program

2006

Séminaires de Physique Mathématique Service de Physique Théorique,

CEA--Saclay

20th November 2006

Title: Characterization of resonances using finite size effects

2001

Centre for Particle Theory, Deparment of Mathematics, Durham University

14th November 2001

Title: Sine-Gordon model with a boundary

2000

Meeting on Methods and Applications of Integrable Boundary QFT

Centre for Particle Theory, Deparment of Mathematics, Durham University, Durham, UK

26th February 2000

Title: The DdV nonlinear integral equation and finite size spectra in IQFT


Other talks at international conferences/workshops

2016

Quantum Integrable Models in and out of Equilibrium  

11-15 January 2016, Isaac Newton Institute for Mathematical Sciences, Cambridge, UK

Title: Initial states in integrable quantum field theory quenches from an integral equation hierarchy

2014

Workshop on Mathematical physics of non-equilibrium quantum systems

18-19 December, 2014, King's College London, London, UK

Title: Correlations after quantum quenches in the XXZ spin chain: Failure of the Generalized Gibbs Ensemble

2011

8th Bologna workshop on CFT and Integrable Model

12-15 September, 2011, INFN Sezione di Bologna, Bologna, Italy

Title: Thermal correlators in integrable models

2007

QFEXT07: Workshop on Quantum Field Theory under External Conditions  

17-21 September 2007, Institut für Theoretische Physik, Universität Leipzig, Leipzig , Germany

Title: Casimir effect in the boundary state formalism

2006

7th Bologna workshop on CFT and Integrable Model

5-8 July 2006, INFN Sezione di Bologna, Bologna, Italy

Title: On the boundary form factor program

2000

John Hopkins Workshop on Nonperturbative QFT Methods and Their Applications

19-21 August 2000, Bolyai College, Eötvös University, Budapest, Hungary

Title: Nonperturbative Analysis of the Two-Frequency Sine-Gordon Model

2000

TMR Summer School on Recent Advances and Applications of Conformal Field Theory

22-26 May 2000, Sete, France

Title: k-Folded Sine-Gordon Theory in Finite Volume

1998

2nd annual TMR conference on Integrability, Nonperturbative Effects and Symmetry in Quantum Field Theory

21-25 September 1998, Department of Mathematics, Durham University, Durham, UK

Title: Excited State Scaling Functions in Sine-Gordon Theory

1997

3rd Bologna workshop on CFT and Integrable Models

1-4 October 1997, INFN Sezione di Bologna, Bologna, Italy

Title: Scattering Amplitudes in Imaginary Coupled g2(1) and d4(3) Toda Field Theories

1996

Triangle Seminar on Particle Physics

November 1996, Universität Wien, Vienna, Austria

Title: On the Relation Between Φ(1,2) and Φ(1,5) Perturbations of Minimal Models

1996

Eötvös School and Workshop on Conformal Field Theory and Integrable Models

13-21 August 1996, Bolyai College, Eötvös University, Budapest, Hungary

Title: Φ(1,5) Perturbations of Virasoro Minimal Models


School lectures in Hungarian

Summer School in Theoretical Physics, 1993-2008: Gyöngyöstarján, 2009-2010: Tihany, Hungary

2010 The quantum world: emergent classicality and probabilistic interpretation (1 lecture)
2009 AdS/CFT: the Maldacena Conjecture (2 lectures)
2002 AdS/CFT: the Maldacena Conjecture (3 lectures)
1997 Nontrivial Fixed Points in SUSY Gauge Theories (3 lectures)
1994 Matrix Models and 2D Quantum Gravity (2 lectures)
1993 Perturbative Finite Temperature Quantum Field Theory (5 lectures)

Balaton Summer School in Theoretical Physics

2009 Balaton Summer School "From quarks to galaxies", 5-12 July 2009, Balatongyörök Particle Physics: Theoretical Introduction (4 lectures)

Other seminars and lectures in Hungary

2018

BME Wigner College plenary lecture

1st March 2018

Title: Solitons (in Hungarian)

2017

BME Faculty of Science Open Day

10 November 2017

Title: Alice in Wonderland: the World of Particles (in Hungarian)

2017

3rd Physics Meets Philosophy workshop on Foundations of Thermodynamics and Statistical Mechanics

25 September 2017, Budapest

Title: Fundamentals of quantum thermodynamics

2016

BME Open Day, 25 November 2016

Title: Waves, particles and wonders of the quantum world (in Hungarian)

2016

Apáczai Days,  Apáczai Csere János Practice School, Budapest

23 March 2016

Title: Alice in Wonderland: the world of particles (in Hungarian)

2016

Theoretical Physics Seminar Department of Theoretical Physics, Budapest University of Technology and Economics

March 11, 2016

Title: Particle Formation and Ordering in Strongly Correlated Fermionic Systems: Solving a Model of Quantum Chromodynamics

2015

Apáczai DaysApáczai Csere János Practice School, Budapest 

1 April 2015 

Title: Polarized light (light as you never saw before) (in Hungarian)

2014

Theoretical Physics Seminar Department of Theoretical Physics, Budapest University of Technology and Economics

28 October 2014

Title: Correlations after quantum quenches in the XXZ spin chain: Failure of the Generalized Gibbs Ensemble

2012

Particle Physics Seminar

11th April 2012, Institute of Physics, Eötvös University, Budapest

Title: Excited state boundary entropy (g-)functions

2012

Hungarian Skeptic Society's Club Meeting

21st February 2012

Title: "Quo vadis, theoria chordarum?" – status and prespectives of string theory (in Hungarian)

2012

Particle Physics Seminar, Institute of Physics, Eötvös University, Budapest 

15th February 2012

Title: Determination of resonances and matrix elements in finite volume: anomalous exponential corrections

2011

Ortvay Colloquium, Institute of Physics, Eötvös University, Budapest

17th November 2011

Title: Quantum field theory in two dimensions (in Hungarian)

2011

Particle Physics Seminar, Institute of Physics, Eötvös University, Budapest

12th October 2011

P. Forgács, A. Patkós, G. Takács, G. Cynolter, A. Jakovác: Faster than light? Theoretical considerations

2010

Particle Physics Seminar, Institute of Physics, Eötvös University, Budapest

6th October 2010 

Title: Form factor expansion for thermal correlators

2010

Particle Physics Seminar, Institute of Physics, Eötvös University, Budapest

25th November 2010 

Title: Gravity as an entropic force

2010

Theoretical Physics Seminar, Research Institute for Particle and Nuclear Physics, Budapest

24th September 2010 

Title: Gravity as entropic force

2010

Seminar of the Hungarian CMS Group, Research Institute for Particle and Nuclear Physics, Budapest

26th April and 10th May 2010 

Title: Cosmology and the MSSM: theoretical background and present limits

2010

Seminar of the Dept. of Theoretical Physics, Institute of Physics, Budapest University of Technology and Economics, Budapest

23rd April 2010 

Title: Form factor expansion of finite temperature correlators

2009

Particle Physics Seminar, Institute of Physics, Eötvös University, Budapest

16th September 2009 

Title: Form factor perturbation theory in nonintegrable models: a systematic expansion based on finite size effects

2009

Particle Physics Seminar, Institute of Physics, Eötvös University, Budapest

13th May 2009 

Title: Effective Potential and Topological Excitations in Nonintegrable Field Theories

2008

Ortvay Colloquium, Institute of Physics, Eötvös University, Budapest

4th December 2008 

Title: Casimir Effect and the Physical Vacuum

2008

Mathematics/Physics Seminar, Eötvös College, Budapest

9th October 2008 

Title: Vacuum energy: the Casimir effect and beyond

2007

Particle Physics Seminar, Institute of Physics, Eötvös University, Budapest

17th October 2007 

Title: Finite Temperature Correlators in Integrable Quantum Field Theories

2004

Particle Physics Seminar, Institute of Physics, Eötvös University, Budapest

13th October 2004 

Title: Finite Size Effects in Boundary Quantum Field Theories

 

Links

PhD supervisor page (Hungarian Doctoral Council)