Results 51 to 60 of about 1,518,477 (199)

Subsampling effects in neuronal avalanche distributions recorded in vivo

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, Priesemann Viola, Wibral Michael   +2 more
doaj   +1 more source

Grassmannian Sigma Models

Advances in Theoretical and Mathematical Physics
51 pages, 7 ...
Bykov, Dmitri, Krivorol, Viacheslav
openaire   +3 more sources

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.
openaire   +2 more sources

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

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, Daniel G. Robbins, Eric Sharpe, Thomas Vandermeulen   +3 more
doaj   +1 more source

Linear Sigma Models with Torsion

, 2013
Gauged linear sigma models with (0,2) supersymmetry allow a larger choice of couplings than models with (2,2) supersymmetry. We use this freedom to find a fully linear construction of torsional heterotic compactifications, including models with branes ...
A Adams, A Adams, A Adams, A Butti, A Knauf, A Strominger, BR Greene, C Hull, Callum Quigley, D Andriot, DR Morrison, DS Hwang, E Goldstein, E Witten, F Chen, G Lopes Cardoso, H Itoyama, IV Melnikov, J Evslin, J Gutowski, J Louis, J Maldacena, J McOrist, J-X Fu, J-X Fu, JP Gauntlett, K Becker, K Becker, K Becker, K Becker, K Becker, K Becker, K Becker, K Dasgupta, K Dasgupta, K Fujikawa, KA Intriligator, L Carlevaro, M Blaszczyk, M Cvetič, R Casero, S Kim, S Sethi, Savdeep Sethi, T Kimura   +44 more
core   +1 more source

SUPERMAGNETS AND SIGMA MODELS [PDF]

Gribov Memorial Volume, 2006
22 ...
openaire   +2 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

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, Cattaneo Alberto, Iraso Riccardo   +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