Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Árpád Hegedűs"'
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 5, Pp 1-69 (2024)
Abstract Integrability methods give us access to a number of observables in the planar N $$ \mathcal{N} $$ = 4 SYM. Among them, the Quantum Spectral Curve (QSC) governs the spectrum of anomalous dimensions. Low lying states were successfully studied
Externí odkaz:
https://doaj.org/article/c7deb901851842beb1fdf12da9d60374
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 9, Pp 1-54 (2022)
Abstract We reconsider the complete solution of the linear TBA equation describing the energy density of finite density states in the O(N) nonlinear sigma models by the Wiener-Hopf method. We keep all perturbative and non-perturbative contributions a
Externí odkaz:
https://doaj.org/article/15c01e88a5dc49a397ae62545b3de71d
Autor:
Árpád Hegedűs
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 7, Pp 1-34 (2021)
Abstract In this paper we derive from field theory a Lüscher-formula, which gives the leading exponentially small in volume corrections to the 1-particle form-factors in non-diagonally scattering integrable quantum field theories. Our final formula
Externí odkaz:
https://doaj.org/article/4084e077dd89417e87950e059d6c18f9
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 5, Pp 1-38 (2021)
Abstract We analyze the free energy of the integrable two dimensional O(4) sigma model in a magnetic field. We use Volin’s method to extract high number (2000) of perturbative coefficients with very high precision. The factorial growth of these coe
Externí odkaz:
https://doaj.org/article/f29de35525cd4de0a502d15e45c8c81e
Publikováno v:
Physics Letters B, Vol 829, Iss , Pp 137073- (2022)
We investigate the ground-state energy of the integrable two dimensional O(3) sigma model in a magnetic field. By determining a large number of perturbative coefficients we explore the closest singularities of the corresponding Borel function. We the
Externí odkaz:
https://doaj.org/article/9c93e44ec80348388e2893f156431843
Autor:
Árpád Hegedűs
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 1, Pp 1-38 (2020)
Abstract Using the fermionic basis discovered in the 6-vertex model, we derive exact formulas for the expectation values of local operators of the sine-Gordon theory in any eigenstate of the Hamiltonian. We tested our formulas in the pure multi-solit
Externí odkaz:
https://doaj.org/article/f7a3e54781c94442a359d49395bb98cd
Publikováno v:
Physics Letters B, Vol 818, Iss , Pp 136369- (2021)
We study the resurgent trans-series for the free energy of the two-dimensional O(4) sigma model in a magnetic field. Exploiting integrability, we obtain very high-order perturbative data, from which we can explore non-perturbative sectors. We are abl
Externí odkaz:
https://doaj.org/article/18aba42c3cd941babcd1945f872736d4
Autor:
Árpád Hegedűs
Publikováno v:
Nuclear Physics B, Vol 933, Iss , Pp 349-383 (2018)
The 6-vertex model with appropriately chosen alternating inhomogeneities gives the so-called light-cone lattice regularization of the sine-Gordon (Massive-Thirring) model. In this integrable lattice model we consider pure hole states above the antife
Externí odkaz:
https://doaj.org/article/13a6daebd9be4c4c978fe10fc0993e93
Autor:
Árpád Hegedűs
Publikováno v:
Nuclear Physics B, Vol 948, Iss , Pp - (2019)
In this paper we present sets of linear integral equations which make possible to compute the finite volume expectation values of the trace of the stress energy tensor (Θ) and the U(1) current (Jμ) in any eigenstate of the Hamiltonian of the sine-G
Externí odkaz:
https://doaj.org/article/a688d8545d3549948af3d9afc6bb1be5
Autor:
Árpád Hegedűs
Publikováno v:
Journal of High Energy Physics, Vol 2018, Iss 3, Pp 1-53 (2018)
Abstract In this paper, using the light-cone lattice regularization, we compute the finite volume expectation values of the composite operator Ψ ¯ Ψ $$ \overline{\varPsi}\varPsi $$ between pure fermion states in the Massive Thirring Model. In the
Externí odkaz:
https://doaj.org/article/5f345941daa240238d44c7f913f8a7be