18 citations · 56 across the 5 of their papers we have counts for
5 papers
On the large N expansion in hyperbolic sigma-models
Max Niedermaier, Erhard Seiler
Invariant correlation functions for hyperbolic sigma-models are investigated. The existence of a large asymptotic expansion is proven on finite lattices of dime…
Quantized Einstein-Rosen waves, AdS_2, and spontaneous symmetry breaking
M. Niedermaier
4D cylindrical gravitational waves with aligned polarizations (Einstein-Rosen waves) are shown to be described by a weight 1/2 massive free field on the double cover of AdS_2. Thor…
Varying the Unruh Temperature in Integrable Quantum Field Theories
M. R. Niedermaier
A computational scheme is developed to determine the response of a quantum field theory (QFT) with a factorized scattering operator under a variation of the Unruh temperature. To t…
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…
The Quantum Spectrum of the Conserved Charges in Affine Toda Theories
M. R. Niedermaier
The exact eigenvalues of the infinite set of conserved charges on the multi-particle states in affine Toda theories are determined. This is done by constructing a free field realiz…