Results 71 to 80 of about 25,385,750 (231)
Grassmannian heterotic sigma model [PDF]
Physical Review D, 2019 21 pages, 6 ...
Kreshchuk, Michael +2 more
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N=2 Supersymmetric Sigma Models and D-branes
, 2004 We study D-branes of N=2 supersymmetric sigma models. Supersymmetric nonlinear sigma models with 2-dimensional target space have D0,D1,D2-branes, which are realized as A-,B-type supersymmetric boundary conditions on the worldsheet.
C. Bachas +8 more
core +1 more source
Elliptic genera of ALE and ALF manifolds from gauged linear sigma models [PDF]
, 2014 A bstractWe compute the equivariant elliptic genera of several classes of ALE and ALF manifolds using localization in gauged linear sigma models. In the sigma model computation the equivariant action corresponds to chemical potentials for U(1) currents ...
J. Harvey, Sungjay Lee, S. Murthy
semanticscholar +1 more source
N=2 Boundary conditions for non-linear sigma models and Landau-Ginzburg models [PDF]
, 2002 We study N=2 nonlinear two dimensional sigma models with boundaries and their massive generalizations (the Landau-Ginzburg models). These models are defined over either Kahler or bihermitian target space manifolds. We determine the most general local N=2
A. Kapustin +14 more
core +2 more sources
NONLINEAR SIGMA MODEL ON CONIFOLDS [PDF]
Modern Physics Letters A, 2002 Explicit solutions to the conifold equations with complex dimension n = 3, 4 in terms of complex coordinates (fields) are employed to construct the Ricci-flat Kähler metrics on these manifolds. The Kähler two-forms are found to be closed. The complex realization of these conifold metrics are used in the construction of two-dimensional nonlinear sigma ...
Parthasarathy, R., Viswanathan, K. S.
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Subsampling effects in neuronal avalanche distributions recorded
BMC Neuroscience, 2009 Background Many systems in nature are characterized by complex behaviour where large cascades of events, or avalanches, unpredictably alternate with periods of little activity. Snow avalanches are an example.
Munk Matthias HJ +2 more
doaj +1 more source
Classifying bions in Grassmann sigma models and non-Abelian gauge theories by D-branes [PDF]
, 2014 We classify bions in the Grassmann GrNF,NC sigma model (including the CP NF−1 model) on R 1 × S 1 with twisted boundary conditions. We formulate these models as UNCgauge the- ories with NF flavors in the fundamental representations. These theories can be
T. Misumi, M. Nitta, N. Sakai
semanticscholar +1 more source
Equivariant topological sigma models [PDF]
Nuclear Physics B, 1994 We identify and examine a generalization of topological sigma models suitable for coupling to topological open strings. The targets are Kahler manifolds with a real structure, i.e. with an involution acting as a complex conjugation, compatible with the Kahler metric.
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Orbifolds by 2-groups and decomposition
Journal of High Energy Physics, 2022 In this paper we study three-dimensional orbifolds by 2-groups with a trivially-acting one-form symmetry group BK. These orbifolds have a global two-form symmetry, and so one expects that they decompose into (are equivalent to) a disjoint union of other ...
Tony Pantev +3 more
doaj +1 more source
Schrödinger sigma models and Jordanian twists [PDF]
, 2013 A bstractWe proceed to study the integrable structures of two-dimensional non-linear sigma models defined on three-dimensional Schrödinger spacetimes. We show that anisotropic Lax pairs are equivalent with isotropic Lax pairs with flat conserved currents
Io Kawaguchi +2 more
semanticscholar +1 more source