Results 11 to 20 of about 847,218 (303)
Integrable crosscaps in classical sigma models
Journal of High Energy Physics, 2023 We study the integrable boundaries and crosscaps of classical sigma models. We show that there exists a classical analog of the integrability condition and KT-relation of the boundary and crosscap states of quantum spin chains.
Tamas Gombor
doaj +3 more sources
Quasicomplex N=2, d=1 Supersymmetric Sigma Models [PDF]
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 +2 more sources
String Sigma Models on Curved Supermanifolds
Universe, 2018 We use the techniques of integral forms to analyze the easiest example of two-dimensional sigma models on a supermanifold. We write the action as an integral of a top integral form over a D = 2 supermanifold, and we show how to interpolate between ...
Roberto Catenacci +1 more
doaj +3 more sources
Journal of High Energy PhysicsWith the use of mathematical techniques of tropical geometry, it was shown by Mikhalkin some twenty years ago that certain Gromov-Witten invariants associated with topological quantum field theories of pseudoholomorphic maps can be computed by going to ...
Emil Albrychiewicz +3 more
doaj +4 more sources
Junctions of mass-deformed nonlinear sigma models on SO(2N)/U(N) and Sp(N)/U(N). Part II
Journal of High Energy Physics, 2020 We construct three-pronged junctions of mass-deformed nonlinear sigma models on SO(2N)/U(N) and Sp(N )/U(N ) for generic N. We study the nonlinear sigma models on the Grassmann manifold or on the complex projective space.
Taegyu Kim, Sunyoung Shin
doaj +3 more sources
International Journal of Modern Physics A, 1991 WOS: A1991ER64600010Integrability of sigma models is investigated in arbitrary dimensions. The conditions of the integrability are found and the corresponding linear eigenvalue equations are given.
Gürses, Metin +3 more
core +3 more sources
Dirac sigma models from gauging [PDF]
Journal of High Energy Physics, 2013 peer reviewedThe G/G WZW model results from the WZW-model by a standard procedure of gauging. G/G WZW models are members of Dirac sigma models, which also contain twisted Poisson sigma models as other examples.
Vladimir Salnikov, Thomas Strobl
exaly +2 more sources
Higher derivative sigma models
Journal of High Energy PhysicsWe explore the nature of running couplings in the higher derivative linear and nonlinear sigma models and show that the results in dimensional regularization for the physical running couplings do not always match the values quoted in the literature. Heat
John F. Donoghue, Gabriel Menezes
doaj +3 more sources
Aspects of Nonrelativistic Strings
Frontiers in Physics, 2022 We review recent developments on nonrelativistic string theory. In flat spacetime, the theory is defined by a two-dimensional relativistic quantum field theory with nonrelativistic global symmetries acting on the worldsheet fields.
Gerben Oling, Gerben Oling, Ziqi Yan
doaj +1 more source
Sigma-Lognormal Modeling of Speech [PDF]
Cognitive Computation, 2021 AbstractHuman movement studies and analyses have been fundamental in many scientific domains, ranging from neuroscience to education, pattern recognition to robotics, health care to sports, and beyond. Previous speech motor models were proposed to understand how speech movement is produced and how the resulting speech varies when some parameters are ...
Cristina Carmona-Duarte +4 more
openaire +5 more sources