Results 51 to 60 of about 809,200 (215)
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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Advances in Theoretical and Mathematical Physics51 pages, 7 ...
Bykov, Dmitri, Krivorol, Viacheslav
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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
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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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Pseudoduality in sigma models [PDF]
Nuclear Physics B, 2002 We revisit classical "on shell" duality, i.e., pseudoduality, in two dimensional conformally invariant classical sigma models and find some new interesting results. We show that any two sigma models that are "on shell" duals have opposite 1-loop renormalization group beta functions because of the integrability conditions for the pseudoduality ...
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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
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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.
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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
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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
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