Results 81 to 90 of about 25,385,750 (231)
Conformal superspace sigma-models
, 2011 We review recent developments in the context of two-dimensional conformally invariant sigma-models. These quantum field theories play a prominent role in the covariant superstring quantization in flux backgrounds and in the analysis of disordered systems.
Mitev, V., Quella, T., Schomerus, V.
openaire +3 more sources
Spin fields for the spinning particle
Journal of High Energy Physics, 2022 We propose an analogue of spin fields for the relativistic RNS-particle in 4 dimensions, in order to describe Ramond-Ramond states as “two-particle” excitations on the world line.
E. Boffo, I. Sachs
doaj +1 more source
Twining genera of (0,4) supersymmetric sigma models on K3 [PDF]
, 2013 A bstractConformal field theories with (0,4) worldsheet supersymmetry and K3 target can be used to compactify the E8 × E8 heterotic string to six dimensions in a supersymmetric manner.
Sarah M. Harrison +2 more
semanticscholar +1 more source
Comparing Poisson Sigma Model with A-model [PDF]
Journal of High Energy Physics, 2016 We discuss the A-model as a gauge fixing of the Poisson Sigma Model with target a symplectic structure. We complete the discussion in [arXiv:0706.3164], where a gauge fixing defined by a compatible complex structure was introduced, by showing how to recover the A-model hierarchy of observables in terms of the AKSZ observables.
Bonechi Francesco +2 more
openaire +4 more sources
Quasicomplex N=2, d=1 Supersymmetric Sigma Models
Symmetry, Integrability and Geometry: Methods and Applications, 2013 We derive and discuss a new type of N=2 supersymmetric quantum mechanical sigma models which appear when the superfield action of the (1,2,1) multiplets is modified by adding an imaginary antisymmetric tensor to the target space metric, thus completing ...
Evgeny A. Ivanov, Andrei V. Smilga
doaj +1 more source
Generalized supersymmetry and sigma models [PDF]
, 2013 In this paper, we discuss the generalizations of exact supersymmetries present in the supersymmetrized sigma models. These generalizations are made by making the supersymmetric transformation parameter field-dependent.
R. Banerjee, S. Upadhyay
semanticscholar +1 more source
Generating solutions via sigma-models
, 2008 We review recent development of solution-generating techniques for four and five-dimensional Einstein equations coupled to vector and scalar fields. This includes D=4 Einstein-Maxwell-dilaton-axion theory with multiple vector fields, D=5 Einstein-Maxwell
Gal'tsov, Dmitri V.
core +1 more source
Journal of High Energy Physics, 2019 We consider a class of ansätze for the construction of exact solutions of the Einstein-nonlinear σ-model system with an arbitrary cosmological constant in (3+1) dimensions.
Alex Giacomini, Marcello Ortaggio
doaj +1 more source
Testing dark energy models in the light of $$\sigma _8$$ σ8 tension
European Physical Journal C: Particles and Fields, 2019 It has been pointed out that there exists a tension in $$\sigma _8-\varOmega _m$$ σ8-Ωm measurement between CMB and LSS observation. In this paper we show that $$\sigma _8-\varOmega _m$$ σ8-Ωm observations can be used to test the dark energy theories. We
Gaetano Lambiase +3 more
doaj +1 more source
Lectures on AKSZ Sigma Models for Physicists [PDF]
, 2012 This is an introductory review of topological field theories (TFTs) called AKSZ sigma models. The AKSZ construction is a mathematical formulation for the construction and analyses of a large class of TFTs; it was inspired by the Batalin-Vilkovisky ...
N. Ikeda
semanticscholar +1 more source