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In this note we extend to non trivial Hamiltonian fibrations over symplectically uniruled manifolds a result of Lu's, \cite{Lu}, stating that any trivial symplectic product of two closed symplectic manifolds with one of them being…

Symplectic Geometry · Mathematics 2016-01-20 Clement Hyvrier

This is a collection of results on the topology of toric symplectic manifolds. Using an idea of Borisov, we show that a closed symplectic manifold supports at most a finite number of toric structures. Further, the product of two projective…

Symplectic Geometry · Mathematics 2014-11-11 Dusa McDuff

(Bi)modules, morphisms and reduction of star-products are studied in a framework of multidifferential operators along maps: morphisms deform Poisson maps and representations on functions spaces deform coisotropic maps. If a star-product is…

Quantum Algebra · Mathematics 2007-05-23 Martin Bordemann

We show that the eigenvalues and eigenfunctions of the stargenvalue equation can be completely expressed in terms of the corresponding eigenvalue problem for the quantum Hamiltonian. Our method makes use of a Weyl-type representation of the…

Mathematical Physics · Physics 2008-08-05 M. de Gosson , Franz Luef

In this paper, we formulate the phase space description of qubit systems using coadjoint orbits of $SU(2)$ and the Stratonovich-Weyl correspondence, yielding a deformation quantization on the sphere. The resulting star product reproduces…

Quantum Physics · Physics 2026-04-08 Jasel Berra-Montiel , Alberto Molgado , Mar Sánchez-Córdova

We study holomorphic spheres in certain symplectic cobordisms and derive information about periodic Reeb orbits in the concave end of these cobordisms from the non-compactness of the relevant moduli spaces. We use this to confirm the strong…

Symplectic Geometry · Mathematics 2019-03-12 Hansjörg Geiges , Kai Zehmisch

We develop elliptic theory of operators associated with a diffeomorphism of a closed smooth manifold. The aim of the present paper is to obtain an index formula for such operators in terms of topological invariants of the manifold and of…

Operator Algebras · Mathematics 2015-11-06 Anton Savin , Boris Sternin

We present a deformed star-product for a particle in the presence of a magnetic monopole. The product is obtained within a self-dual quantization-dequantization scheme, with the correspondence between classical observables and operators…

Mathematical Physics · Physics 2014-11-20 J. F. Carinena , J. M. Gracia-Bondia , Fedele Lizzi , Giuseppe Marmo , Patrizia Vitale

We present a simple no-go theorem for the existence of a deformation quantization of a homogeneous space M induced by a Drinfel'd twist: we argue that equivariant line bundles on M with non-trivial Chern class and symplectic twist star…

Quantum Algebra · Mathematics 2017-11-21 Francesco D'Andrea , Thomas Weber

The present paper deals with the study of warped product pointwise bi-slant submanifolds of Kenmotsu manifolds with an example. The characterization for such submanifold is also discussed. An inequality of such submanifold is obtained and…

Differential Geometry · Mathematics 2018-03-29 Shyamal Kumar Hui , Joydeb Roy , Tanumoy Pal

We develop an internal gauge theory using a covariant star product. The space-time is a symplectic manifold endowed only with torsion but no curvature. It is shown that, in order to assure the restrictions imposed by the associativity…

High Energy Physics - Theory · Physics 2014-11-20 M. Chaichian , M. Oksanen , A. Tureanu , G. Zet

We introduce a direct generalization of the Weinstein conjecture to closed, Lichnerowicz exact, locally conformally symplectic manifolds, (for short $\lcs$ manifolds). This conjectures existence of certain 2-curves in the manifold, which we…

Symplectic Geometry · Mathematics 2023-10-16 Yasha Savelyev

Adopting a purely group-theoretical point of view, we consider the star product of functions which is associated, in a natural way, with a square integrable (in general, projective) representation of a locally compact group. Next, we show…

Mathematical Physics · Physics 2009-11-13 Paolo Aniello

The use of a diffeomorphism covariant star product enables us to construct diffeomorphism invariant gravities on noncommutative symplectic manifolds without twisting the symmetries. As an example, we construct noncommutative deformations of…

High Energy Physics - Theory · Physics 2011-04-14 D. V. Vassilevich

To a finite quiver equipped with a positive integer on each of its vertices, we associate a holomorphic symplectic manifold having some parameters. This coincides with Nakajima's quiver variety with no stability parameter/framing if the…

Representation Theory · Mathematics 2010-10-27 Daisuke Yamakawa

The problem of finding a generic star product on R^n is reduced to the computation of a skew-symmetric biderivation.

Mathematical Physics · Physics 2015-12-17 A. V. Bratchikov

We introduce the concept of pseudo symplectic capacities which is a mild generalization of that of symplectic capacities. As a generalization of the Hofer-Zehnder capacity we construct a Hofer-Zehnder type pseudo symplectic capacity and…

Symplectic Geometry · Mathematics 2007-05-23 Guangcun Lu

This dissertation is an exposition of Kontsevich's proof of the formality theorem and the classification of deformation quantisation on a Poisson manifold. We begin with an account of the physical background and introduce the Weyl-Moyal…

Mathematical Physics · Physics 2022-07-19 Peize Liu

The construction of the *-product proposed by Fedosov is implemented in terms of the theory of fibre bundles. The geometrical origin of the Weyl algebra and the Weyl bundle is shown. Several properties of the product in the Weyl algebra are…

High Energy Physics - Theory · Physics 2008-11-26 M. Gadella , M. A. del Olmo , J. Tosiek

Some properties of the star product of the Weyl type (i.e. associated with the Weyl ordering) are proved. Fedosov construction of the *-product on a 2-dimensional phase spacewith a constant curvature tensor is presented. Eigenvalue…

High Energy Physics - Phenomenology · Physics 2009-11-10 M. Gadella , M. A. del Olmo , J. Tosiek
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