Zobrazeno 1 - 10
of 219
pro vyhledávání: '"Frahm, Holger"'
Autor:
Frahm, Holger, Gehrmann, Sascha
Publikováno v:
Nucl. Phys. B 1006 (2024) 116655
The finite-size spectrum of the critical staggered six-vertex model with antidiagonal boundary conditions is studied. Similar to the case of periodic boundary conditions, we identify three different phases. In two of those, the underlying conformal f
Externí odkaz:
http://arxiv.org/abs/2405.20919
Publikováno v:
SciPost Phys. 16, 149 (2024)
We study the scaling limit of a statistical system, which is a special case of the integrable inhomogeneous six-vertex model. It possesses $U_q\big(\mathfrak{sl}(2)\big)$ invariance due to the choice of open boundary conditions imposed. An interestin
Externí odkaz:
http://arxiv.org/abs/2312.11238
Publikováno v:
JHEP 2023(11) 095
Using the analytic Bethe ansatz, we initiate a study of the scaling limit of the quasi-periodic $D^{(2)}_3$ spin chain. Supported by a detailed symmetry analysis, we determine the effective scaling dimensions of a large class of states in the paramet
Externí odkaz:
http://arxiv.org/abs/2307.11511
Autor:
Frahm, Holger, martins, Márcio J.
Publikováno v:
NUcl. Phys. B 995 (2023) 116329
Based on the finite-size analysis of the spectrum of the quantum group invariant deformation of the $OSp(3|2)$ superspin chain we identify the operator content of the conformal field theory describing the model in its scaling limit. We find that the
Externí odkaz:
http://arxiv.org/abs/2307.09412
Publikováno v:
J. Stat. Mech. (2023) 083104
We study reduced density matrices of the integrable critical RSOS model in a particular topological sector containing the ground state. Similar as in the spin-$1/2$ Heisenberg model it has been observed that correlation functions of this model on sho
Externí odkaz:
http://arxiv.org/abs/2303.15252
Autor:
Frahm, Holger, Gehrmann, Sascha
Publikováno v:
J. Phys. A: Math. Theor. 56 (2023) 025001
Yang-Baxter integrable vertex models with a generic $\mathbb{Z}_2$-staggering can be expressed in terms of composite $\mathbb{R}$-matrices given in terms of the elementary $R$-matrices. Similarly, integrable open boundary conditions can be constructe
Externí odkaz:
http://arxiv.org/abs/2209.06182
Autor:
Frahm, Holger, Martins, Márcio J.
Publikováno v:
Nucl. Phys. B 980 (2022) 115799
In this paper we investigate the spectrum of $OSp(n|2m)$ quantum spin chains with free boundary conditions. We compute the surface free energy of these models which, similar to other properties in the thermodynamic limit including the effective centr
Externí odkaz:
http://arxiv.org/abs/2202.13405
Autor:
Frahm, Holger, Gehrmann, Sascha
Publikováno v:
JHEP 2022(01) 070
The finite size spectrum of the critical $\mathbb{Z}_2$-staggered spin-$1/2$ XXZ model with quantum group invariant boundary conditions is studied. For a particular (self-dual) choice of the staggering the spectrum of conformal weights of this model
Externí odkaz:
http://arxiv.org/abs/2111.00850
Autor:
Frahm, Holger, Westerfeld, Daniel
Publikováno v:
SciPost Phys. 11, 057 (2021)
Using the properties of the local Boltzmann weights of integrable interaction-round-a-face (IRF or face) models we express local operators in terms of generalized transfer matrices. This allows for the derivation of discrete functional equations for
Externí odkaz:
http://arxiv.org/abs/2104.06269
Autor:
Frahm, Holger, Martins, Márcio J.
Publikováno v:
In Nuclear Physics, Section B October 2023 995
