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38 results for AKSZ

This is an introductory review of topological field theories (TFTs) called AKSZ sigma models. The AKSZ construction is a mathematical formulation for the construction and analyses of a large class of TFTs, inspired by the Batalin-Vilkovisky formalism of gauge theories. We begin by considering a simple two-dimensional t…

2012-04-17abs ↗pdf ↗

The well-known AKSZ construction (for Alexandrov--Kontsevich--Schwarz--Zaboronsky) gives an odd symplectic structure on a space of maps together with a functional SS that is automatically a solution for the classical master equation (S,S)=0(S,S)=0. The input data required for the AKSZ construction consist of a volume eleme…

2012-11-27abs ↗pdf ↗

Extends AKSZ construction to supermanifolds with integral forms, deriving sigma model terms.

problem Deriving sigma model terms for 2D (1,1) theory on boundaries.
method Natural extension of AKSZ construction to supermanifolds with integral forms, focusing on Courant algebroids.
result Derives 2D (1,1) sigma model terms including Wess-Zumino term.

Reinterprets M-theory geometry and identifies Wess-Zumino terms.

problem Understanding and interpreting M-theory geometry and Wess-Zumino terms.
method Using AKSZ construction and LL_\infty-algebroid, the paper reinterprets M-theory geometry and identifies Wess-Zumino terms.
result Identifies the M-theory Wess-Zumino term with a 7-dimensional Chern-Simons theory.

Study topological A/B-models using double field theory and generalized geometry.

problem Tackles topological A/B-models within a double field theory framework.
method AKSZ-type BV constructions, Courant sigma-model, generalized complex structure.
result Introduces S-duality in membrane sigma-model based on generalized complex structure.

Develops a facewise formulation of AKSZ construction on manifolds with ordinary corners.

problem Formulating AKSZ construction on manifolds with ordinary corners.
method Explicit formal mapping-space hypothesis, facewise formulation, organization over face poset, Hamiltonian defect, face incidence complex.
result Factorially normalized facewise transgression is a cochain map, closed target forms transgress to cocycles, and twice-iterated defect vanishes.

Develops a new approach to describe gauge theories with background fields using presymplectic structures.

problem Describing gauge theories with background fields using presymplectic structures.
method Extension of the presymplectic BV-AKSZ approach to include background fields.
result Gauge theories with background fields correspond to presymplectic gauge PDEs over gauge PDEs describing background fields.

A quantum field theory for Spin(7)-instantons derived from moduli spaces.

problem Constructing a topological quantum field theory for Spin(7)-instantons.
method Using Mathai-Quillen formalism and AKSZ formalism, we derive the action and Batalin-Vilkovisky action.
result The Batalin-Vilkovisky action matches the Mathai-Quillen construction and provides a framework for classical observables.

Derives fluxes in M-theory compactifications and connects them to threebrane sigma-models.

problem Deriving fluxes in M-theory compactifications and understanding their geometric and topological properties.
method Systematic derivation of fluxes from higher Courant brackets and generalized geometry, relating them to threebrane sigma-models.
result Fluxes in M-theory compactifications are understood as generalized Wess-Zumino terms in threebrane sigma-models, linking higher structure to Lie algebroid homotopy.

In the first part of this paper, we work out a perturbative Lagrangian formulation of semistrict higher gauge theory, that avoids the subtleties of the relationship between Lie 2-groups and algebras by relying exclusively on the structure semistrict Lie 2-algebra v and its automorphism 2-group Aut(v). Gauge transformat…

2011-12-13abs ↗pdf ↗

These notes are based on a series of lectures given by the first author at the school of `Poisson 2010', held at IMPA, Rio de Janeiro. They contain an exposition of the theory of super- and graded manifolds, cohomological vector fields, graded symplectic structures, reduction and the AKSZ-formalism.

2010-11-15abs ↗pdf ↗

The paper classifies symplectic Lie and LL_\infty algebroids and their applications.

problem Classifying symplectic Lie and LL_\infty algebroids and their higher gauge symmetries.
method Classifying zero-, one-, and two-shifted symplectic algebroids using classical geometric higher structures.
result New examples of twisted Courant algebroids from codimension-two cycles and symplectic interpretations of higher structures.

Chern-Weil theory provides for each invariant polynomial on a Lie algebra g a map from g-connections to differential cocycles whose volume holonomy is the corresponding Chern-Simons theory action functional. Kotov and Strobl have observed that this naturally generalizes from Lie algebras to dg-manifolds and dg-bundles …

2011-08-22abs ↗pdf ↗

In this paper, we show that associated to any coisotropic Cartan geometry there is a twisted Courant algebroid. This includes in particular parabolic geometries. Using this twisted Courant structure, we give some new results about the Cartan curvature and the Weyl structure of a parabolic geometry. As more direct appli…

2012-06-11abs ↗pdf ↗

This paper puts the theory of quasi-Hamiltonian reduction in the framework of shifted symplectic structures developed by Pantev, Toën, Vaquié and Vezzosi. We compute the symplectic structures on mapping stacks and show how the AKSZ topological field theory defined by Calaque allows one to neatly package the constructio…

2013-11-25abs ↗pdf ↗

We study the Lagrangian antifield BRST formalism, formulated in terms of exterior horizontal forms on the infinite order jet space of graded fields for topological field theories associated to QQ-bundles. In the case of a trivial Q-bundle with a flat fiber and arbitrary base, we prove that the BRST cohomology are isom…

2013-10-01abs ↗pdf ↗

We study deformations of the A-model in the presence of fluxes, by which we mean rank-three tensors with antisymmetrized upper/lower indices, using the AKSZ construction. Generically these are topological membrane models, and we show that the fluxes are related to deformations of the Courant bracket which generalize th…

2008-01-08abs ↗pdf ↗

The Poisson--Weil sigma model, worked out by us recently, stems from gauging a Hamiltonian Lie group symmetry of the target space of the Poisson sigma model. Upon gauge fixing of the BV master action, it yields interesting topological field theories such as the 2--dimensional Donaldson-Witten topological gauge theory a…

2008-10-18abs ↗pdf ↗

The paper proves a category of dg manifolds with finite positive amplitude.

problem Understanding the structure of dg manifolds with finite positive amplitude.
method Using path spaces and homotopy transfer theorem for curved L[1]L_\infty[1]-algebras.
result Proves that dg manifolds of finite positive amplitude form a category of fibrant objects.

Into a geometric setting, we import the physical interpretation of index theorems via semi-classical analysis in topological quantum field theory. We develop a direct relationship between Fedosov's deformation quantization of a symplectic manifold X and the BV quantization of a one-dimensional sigma model with target X…

2015-07-07abs ↗pdf ↗

We show how to carry out the gauging of the Poisson sigma model in an AKSZ inspired formulation by coupling it to the a generalization of the Weil model worked out in ref. arXiv:0706.1289 [hep-th]. We call the resulting gauged field theory, Poisson--Weil sigma model. We study the BV cohomology of the model and show its…

2008-01-04abs ↗pdf ↗

In this contribution we review some of the interplay between sigma models in theoretical physics and novel geometrical structures such as Lie (n-)algebroids. The first part of the article contains the mathematical background, the definition of various algebroids as well as of Dirac structures, a joint generalization of…

2010-04-05abs ↗pdf ↗

A Q-manifold is a graded manifold endowed with a vector field of degree one squaring to zero. We consider the notion of a Q-bundle, that is, a fiber bundle in the category of Q-manifolds. To each homotopy class of ``gauge fields'' (sections in the category of graded manifolds) and each cohomology class of a certain sub…

2007-11-26abs ↗pdf ↗

We introduce and study the Wilson loops in a general 3D topological field theories (TFTs), and show that the expectation value of Wilson loops also gives knot invariants as in Chern-Simons theory. We study the TFTs within the Batalin-Vilkovisky (BV) and Alexandrov-Kontsevich-Schwarz-Zaboronsky (AKSZ) framework, and the…

2010-06-07abs ↗pdf ↗

We propose a model of quantum gravity in arbitrary dimensions defined in terms of the BV quantization of a supersymmetric, infinite dimensional matrix model. This gives an (AKSZ-type) Chern-Simons theory with gauge algebra the space of observables of a quantum mechanical Hilbert space H. The model is motivated by previ…

2014-07-22abs ↗pdf ↗

Lie algebroids relate to constrained systems and their BFV/BFV formulation.

problem Understanding the relation between Lie algebroids and constrained systems.
method BFV/BFV formulation of constrained systems and Hamiltonian lift to cotangent bundles.
result Affine deformations of constraints parametrize first Lie algebroid cohomology.

The paper establishes a Lagrangian correspondence linking different geometric structures on complex varieties.

problem Identifying relationships between different geometric structures on complex varieties.
method Using perfect complexes and shifted symplectic geometries, the paper establishes a Lagrangian correspondence.
result A Lagrangian correspondence between shifted symplectic geometries of flat and Higgs perfect complexes.