Results 71 to 80 of about 809,200 (215)

A noncommutative sigma model

Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie, 2013
We replace the classical string theory notions of mapping between parameter space and world-time with noncommutative tori mapping between these spaces. The dynamics of mappings between different noncommutative tori are studied and noncommutative versions of the Polyakov action and the Euler-Lagrange equations are derived.
openaire   +3 more sources

Singular supersymmetric sigma models

, 2003
Supersymmetric non-linear sigma-models are described by a field dependent Kaehler metric determining the kinetic terms. In general it is not guaranteed that this metric is always invertible. Our aim is to investigate the symmetry structure of supersymmetric models in four dimensional space-time in which metric singularities occur.
Nyawelo, T. S., Riccioni, F., van Holten, J. W., Groot Nibbelink, S.   +3 more
openaire   +3 more sources

Application of biological variation and six sigma models to evaluate analytical quality of six HbA1c analyzers and design quality control strategy

Artificial Cells, Nanomedicine, and Biotechnology, 2019
Objective To apply biological variation and six Sigma models to evaluate analysis performance of 6 HbA1c analyzers and design the new quality control strategy.Method We collected data of imprecision and inaccuracy from routine internal quality control ...
Xia Wang, Dongmei Wen, Weijia Wang, Minghuan Suo, Ting Hu   +4 more
doaj   +1 more source

Integrability in sigma-models [PDF]

, 2019
Abstract The following topics are covered in this chapter: (1) Homogeneous spaces, (2) Classical integrability of sigma-models in two dimensions, (3) Topological terms, (4) Background-field method and beta-function, (5) S-matrix bootstrap in the O(N) model, (6) Supersymmetric coset models and strings on AdS(d) x X.
openaire   +2 more sources

Local β-deformations and Yang-Baxter sigma model

Journal of High Energy Physics, 2018
Homogeneous Yang-Baxter (YB) deformation of AdS5 × S5 superstring is revisited. We calculate the YB sigma model action up to quadratic order in fermions and show that homogeneous YB deformations are equivalent to β-deformations of the AdS5 ×S5 background
Jun-ichi Sakamoto, Yuho Sakatani
doaj   +1 more source

ON RENORMALIZATION OF POISSON–LIE T-PLURAL SIGMA MODELS

Acta Polytechnica, 2013
Covariance of the one-loop renormalization group equations with respect to Poisson–Lie T-plurality of sigma models is discussed. The role of ambiguities in renormalization group equations of Poisson–Lie sigma models with truncated matrices of parameters ...
Ladislav Hlavatý, Josef Navrátil, Libor Šnobl   +2 more
doaj   +1 more source

The Variational Problem and Background Field in the Renormalization Group Method for Nonlinear Sigma Models [PDF]

, 2023
Abhishek Goswami
openalex   +1 more source

Nicolai maps for supersymmetric sigma models

Journal of High Energy Physics
Supersymmetric field theories can be characterized by their Nicolai map, which is a nonlinear and nonlocal field transformation to their free-field limit.
Olaf Lechtenfeld
doaj   +1 more source

Vacua, walls and junctions in GNF,NC

Nuclear Physics B, 2019
We discuss vacua, walls and three-pronged junctions of the mass-deformed nonlinear sigma models on the Grassmann manifold GNF,NC=SU(NF)SU(NC)×SU(NF−NC)×U(1), which are non-Abelian gauge theories for NC≥2. Polyhedra are proposed in [1] to describe Bogomol'
Sunyoung Shin
doaj   +1 more source

Topological defects in K3 sigma models

Journal of High Energy Physics
We consider the topological defect lines commuting with the spectral flow and the N $$ \mathcal{N} $$ = (4, 4) superconformal symmetry in two dimensional non-linear sigma models on K3.
Roberta Angius, Stefano Giaccari, Roberto Volpato   +2 more
doaj   +1 more source