Publications (31)
Classical Wakimoto Realizations of Chiral WZNW Bloch Waves
J. Balog, L. Feher, L. Palla
It is well-known that the chiral WZNW Bloch waves satisfy a quadratic classical exchange algebra which implies the affine Kac-Moody algebra for the corresponding currents. We here…
A two-dimensional integrable axionic sigma-model and T-duality
J. Balog, P. Forgacs, L. Palla
An -matrix is proposed for the two dimensional O(3) -model with a dynamical -term (axion model). Exploiting an Abelian T-duality transformation connecting the axion mode…
A Scaling Hypothesis for the Spectral Densities in the O(3) Nonlinear Sigma-Model
J. Balog, M. Niedermaier
A scaling hypothesis for the n-particle spectral densities of the O(3) nonlinear sigma-model is described. It states that for large particle numbers the n-particle spectral densiti…
Perturbative versus Non-perturbative QFT -- Lessons from the O(3) NLS Model
J. Balog, M. Niedermaier, T. Hauer
The two-point functions of the energy-momentum tensor and the Noether current are used to probe the O(3) nonlinear sigma model in an energy range below 10^4 in units of the mass ga…
TBA equations for excited states in the O(3) and O(4) nonlinear -model
J. Balog, A. Hegedus
TBA integral equations are proposed for 1-particle states in the sausage- and SS-models and their -model limits. Combined with the ground state TBA equations the exact mass gap…
Construction and clustering properties of the 2-d non-linear sigma-model form factors: O(3), O(4), large n examples
J. Balog, P. Weisz
Multi-particle form factors of local operators in integrable models in two dimensions seem to have the property that they factorize when one subset of the particles in the external…
The Intrinsic Coupling in Integrable Quantum Field Theories
J. Balog, M. Niedermaier, F. Niedermayer +3
The intrinsic 4-point coupling, defined in terms of a truncated 4-point function at zero momentum, provides a well-established measure for the interaction strength of a QFT. We sho…
Quantum corrections of Abelian Duality Transformations
J. Balog, P. Forgács, Z. Horváth +1
A modification of the Abelian Duality transformations is proposed guaranteeing that a (not necessarily conformally invariant) -model be quantum equivalent (at least up to two l…
Polynomial Form Factors in the O(3) Nonlinear sigma-Model
J. Balog, T. Hauer
We study the general structure of Smirnov's axioms on form factors of local operators in integrable models. We find various consistency conditions that the form factor functions ha…
Short Distance Repulsion Among Baryons
S. Aoki, J. Balog, T. Doi +2
We review recent investigations on the short distance behaviors of potentials among baryons, which are formulated through the Nambu-Bethe-Salpeter (NBS) wave function. After explai…
Perturbative Quantum (In)equivalence of Dual Models in dimensions
J. Balog, P. Forgács, Z. Horváth +1
Various examples of target space duality transformations are investigated up to two loop order in perturbation theory. Our results show that when using the tree level (`naive') tra…
Off-Shell Dynamics of the O(3) Nonlinear Sigma-Model -- Beyond Monte-Carlo and Perturbation Theory
J. Balog, M. Niedermaier
The off-shell dynamics of the O(3) nonlinear sigma-model is probed in terms of spectral densities and two-point functions by means of the form factor approach. The exact form facto…
Scaling function in AdS/CFT from the O(6) sigma model
Z. Bajnok, J. Balog, B. Basso +2
Asymptotic behavior of the anomalous dimensions of Wilson operators with high spin and twist is governed in planar N=4 SYM theory by the scaling function which coincides at strong…
Drastic Reduction of Cutoff Effects in 2-d Lattice O(N) Models
J. Balog, F. Niedermayer, M. Pepe +2
We investigate the cutoff effects in 2-d lattice O(N) models for a variety of lattice actions, and we identify a class of very simple actions for which the lattice artifacts are ex…
Comparison of analytic and numerical results in the XY-model
J. Balog, F. Knechtli, T. Korzec +1
We study the two dimensional XY-model with high precision Monte Carlo techniques and investigate the continuum approach of the step-scaling function of its finite volume mass gap.…
On Quantum T-duality in sigma models
J. Balog, P. Forgacs, N. Mohammedi +2
The problem of quantum equivalence between non-linear sigma models related by Abelian or non-Abelian T-duality is studied in perturbation theory. Using the anomalous Ward identity…
Coadjoint orbits of the Virasoro algebra and the global Liouville equation
J. Balog, L. Fehér, L. Palla
The classification of the coadjoint orbits of the Virasoro algebra is reviewed and is then applied to analyze the so-called global Liouville equation. The review is self-contained,…
Chiral Extensions of the WZNW Phase Space, Poisson-Lie Symmetries and Groupoids
J. Balog, L. Feher, L. Palla
The chiral WZNW symplectic form is inverted in the general case. Thereby a precise relationship between the arbitrary monodromy dependent 2-form appearing in $Ω^Ï_…
Repairing Stevenson's step in the 4d Ising model
J. Balog, F. Niedermayer, P. Weisz
In a recent paper Stevenson claimed that analysis of the data on the wave function renormalization constant near the critical point of the 4d Ising model is not consistent with ana…
The chiral WZNW phase space as a quasi-Poisson space
J. Balog, L. Feher, L. Palla
It is explained that the chiral WZNW phase space is a quasi-Poisson space with respect to the `canonical' Lie quasi-bialgebra which is the classical limit of Drinfeld's quasi-Hopf…
TBA equations for the mass gap in the O(2r) non-linear sigma-models
J. Balog, A. Hegedus
We propose TBA integral equations for 1-particle states in the O(n) non-linear sigma-model for even n. The equations are conjectured on the basis of the analytic properties of the…
The Chiral WZNW Phase Space and its Poisson-Lie Groupoid
J. Balog, L. Feher, L. Palla
The precise relationship between the arbitrary monodromy dependent 2-form appearing in the chiral WZNW symplectic form and the `exchange r-matrix' that governs the corresponding Po…
Does the XY Model have an integrable continuum limit?
J. Balog, M. Niedermaier, F. Niedermayer +3
The quantum field theory describing the massive O(2) nonlinear sigma-model is investigated through two non-perturbative constructions: The form factor bootstrap based on integrabil…
Virial expansion and TBA in O(N) sigma models
J. Balog, A. Hegedus
We study the free energy of the 1+1 dimensional O(N) nonlinear sigma-models for even N using the TBA equations proposed recently. We give explicit formulae for the constant solutio…
On the rotator Hamiltonian for the SUSU sigma-model in the delta-regime
J. Balog, F. Niedermayer, P. Weisz
We investigate some properties of the standard rotator approximation of the SUSU sigma-model in the delta-regime. In particular we show that the isospin susceptib…
Test of asymptotic freedom and scaling hypothesis in the 2d O(3) sigma model
J. Balog, P. Weisz
The 7--particle form factors of the fundamental spin field of the O(3) nonlinear --model are constructed. We calculate the corresponding contribution to the spin--spin correlat…
Quantum equivalence of sigma models related by non Abelian Duality Transformations
L. K. Balázs, J. Balog, P. Forgács +3
Coupling constant renormalization is investigated in 2 dimensional sigma models related by non Abelian duality transformations. In this respect it is shown that in the one loop ord…
A new family of symmetric integrable sigma models
J. Balog, P. Forgács, Z. Horváth +1
(Minor corrections and reference added)
Displacement memory for flyby
P. -M. Zhang, Q. -L. Zhao, J. Balog +1
Zel'dovich and Polnarev, in their seminal paper [1] suggested that a gravitational wave generated by flyby would merely displace the particles. We confirm their prediction numerica…
On the Chiral WZNW Phase Space, Exchange r-Matrices and Poisson-Lie Groupoids
J. Balog, L. Feher, L. Palla
This is a review of recent work on the chiral extensions of the WZNW phase space describing both the extensions based on fields with generic monodromy as well as those using Bloch…
TBA equations for excited states in the Sine-Gordon model
J. Balog, A. Hegedus
We propose TBA integral equations for multiparticle soliton (fermion) states in the Sine-Gordon (massive Thirring) model. This is based on T-system and Y-system equations, which fo…