Results 11 to 20 of about 25,385,750 (231)
SciPost Physics, 2019 We study (1+1)-dimensional non-linear sigma models whose target space is the flag manifold $U(N)\over U(N_1)\times U(N_2)\cdots U(N_m)$, with a specific focus on the special case $U(N)/U(1)^{N}$.
Kantaro Ohmori, Nathan Seiberg, Shu-Heng Shao
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Advances in Theoretical and Mathematical Physics, 2023 We show that sigma models with orthogonal and symplectic Grassmannian target spaces admit chiral Gross-Neveu model formulations, thus extending earlier results on unitary Grassmannians.
D. Bykov, Viacheslav Krivorol
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Non-local non-linear sigma models [PDF]
Journal of High Energy Physics, 2019 We study non-local non-linear sigma models in arbitrary dimension, focusing on the scale invariant limit in which the scalar fields naturally have scaling dimension zero, so that the free propagator is logarithmic.
Steven S. Gubser +4 more
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Sigma models as Gross–Neveu models [PDF]
Theoretical and Mathematical Physics, 2021 We review the correspondence between integrable sigma models with complex homogeneous target spaces and the chiral bosonic (and possibly mixed bosonic/fermionic) Gross–Neveu models. Mathematically, these are models with quiver variety phase spaces, which
D. Bykov
semanticscholar +4 more sources
Communications in Mathematical Physics, 2005 We introduce a new topological sigma model, whose fields are bundle maps from the tangent bundle of a 2-dimensional world-sheet to a Dirac subbundle of an exact Courant algebroid over a target manifold. It generalizes simultaneously the (twisted) Poisson sigma model as well as the G/G-WZW model.
Kotov, A., Schaller, P., Strobl, T.
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Integrability, duality and sigma models [PDF]
Journal of High Energy Physics, 2018 We introduce and study conformal field theories specified by W −algebras commuting with certain set of screening charges. These CFT’s possess perturbations which define integrable QFT’s. We establish that these QFT’s have local and non-local Integrals of
V. A. Fateev, A. V. Litvinov
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Gauged sigma models and magnetic Skyrmions [PDF]
SciPost Physics, 2019 We define a gauged non-linear sigma model for a 2-sphere valued field and a $SU(2)$ connection on an arbitrary Riemann surface whose energy functional reduces to that for critically coupled magnetic skyrmions in the plane, with arbitrary ...
Bernd J Schroers
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Sigma models with negative curvature [PDF]
Physics Letters B, 2016 We construct Higgs Effective Field Theory (HEFT) based on the scalar manifold Hn, which is a hyperbolic space of constant negative curvature. The Lagrangian has a non-compact O(n,1) global symmetry group, but it gives a unitary theory as long as only a ...
Rodrigo Alonso +2 more
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Non-compact nonlinear sigma models [PDF]
Physics Letters B, 2016 The target space of a nonlinear sigma model is usually required to be positive definite to avoid ghosts. We introduce a unique class of nonlinear sigma models where the target space metric has a Lorentzian signature, thus the associated group being non ...
Claudia de Rham +2 more
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Topological massive sigma models [PDF]
Nuclear Physics B, 1995 20 pages, Phyzzx. Revised version to appear in Nucl. Phys. B.
Birmingham +8 more
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