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Kasparov defined a distinguished K-homology fundamental class, so called the Dirac element. We prove a localization formula for the Dirac element in K-homology of crossed product of C^{*}-algebras. Then we define the quantization of…

Symplectic Geometry · Mathematics 2014-10-10 Yanli Song

Using the analytic assembly map that appears in the Baum-Connes conjecture in noncommutative geometry, we generalise the $\Spin^c$-version of the Guillemin-Sternberg conjecture that `quantisation commutes with reduction' to (discrete series…

Symplectic Geometry · Mathematics 2012-06-27 Peter Hochs

We show that the results of the paper Symplectic Reduction and Riemann-Roch for Circle Actions of Duistermaat, Guillemin, Meinrenken and Wu can be expressed entirely in K-theory. We show that their quantization is simply a pushforward in…

Symplectic Geometry · Mathematics 2007-05-23 David S. Metzler

In this paper we show that the `quantization commutes with reduction' principle of Guillemin-Sternberg holds for the coadjoint orbits that parametrize the discrete series of a real connected semi-simple Lie group.

Differential Geometry · Mathematics 2007-05-23 Paul-Emile Paradan

We analyze the consistency of the ADM approach to KK model; we prove that KK reduction commute with ADM splitting. This leads to a well defined Hamiltonian; we provide the outcome. The electromagnetic constraint is derived from a…

General Relativity and Quantum Cosmology · Physics 2010-11-11 Valentino Lacquaniti , Giovanni Montani

Based on the localization algebras of Yu, and their subsequent analysis by Qiao and Roe, we give a new picture of KK-theory in terms of time-parametrized families of (locally) compact operators that asymptotically commute with appropriate…

K-Theory and Homology · Mathematics 2018-12-26 Marius Dadarlat , Rufus Willett , Jianchao Wu

Let $K$ be a simply connected compact Lie group and $T^{\ast}(K)$ its cotangent bundle. We consider the problem of "quantization commutes with reduction" for the adjoint action of $K$ on $T^{\ast}(K).$ We quantize both $T^{\ast}(K)$ and the…

Mathematical Physics · Physics 2019-10-22 Brian C. Hall , Benjamin D. Lewis

In this paper, we prove that the "quantization commutes with reduction" phenomenon of Guillemin-Sternberg applies in the context of the metaplectic correction.

Symplectic Geometry · Mathematics 2009-11-19 Paul-Emile Paradan

We explain how to define the quantization of q-Hamiltonian SU(2)-spaces as push-forwards in twisted K-homology, and prove a `quantization commutes with reduction' theorem for this setting. As applications, we show how the Verlinde formulas…

Differential Geometry · Mathematics 2013-12-05 E. Meinrenken

We present a K-theoritic approach to the Guillemin-Sternberg conjecture, about the commutativity of geometric quantization and symplectic reduction, which was proved by Meinrenken and Tian-Zhang. Besides providing a new proof of this…

Differential Geometry · Mathematics 2007-05-23 Paul-Emile Paradan

Recently, a multigraviton theory on a simple closed circuit graph corresponding to the discretization of $S^1$ compactification of the Kaluza-Klein (KK) theory has been considered. In the present paper, we extend this theory to that on a…

General Relativity and Quantum Cosmology · Physics 2011-01-27 Teruki Hanada , Koichiro Kobayashi , Kazuhiko Shinoda , Kiyoshi Shiraishi

In this paper we find a simple rule to reproduce the algebra of quantum observables using only the commutators and operators which appear in the Koopman-von Neumann (KvN) formulation of classical mechanics. The usual Hilbert space of…

Quantum Physics · Physics 2009-11-10 D. Mauro

Hamiltonian constraints feature in the canonical formulation of general relativity. Unlike typical constraints they cannot be associated with a reduction procedure leading to a non-trivial reduced phase space and this means the physical…

General Relativity and Quantum Cosmology · Physics 2011-08-25 Karim P. Y. Thebault

We consider the space of $n$-tuples of pairwise commuting elements in the Lie algebra of $U(m)$. We relate its one-point compactification to the subquotients of certain rank filtrations of connective complex $K$-theory. We also describe the…

Algebraic Topology · Mathematics 2024-10-10 Simon Gritschacher

Quantization, at least in some formulations, involves replacing some algebra of observables by a (more non-commutative) deformed algebra. In view of the fundamental role played by K-theory in non-commutative geometry and topology, it is of…

q-alg · Mathematics 2013-02-28 Jonathan Rosenberg

We formulate a quantization commutes with reduction principle in the setting where the Lie group $G$, the symplectic manifold it acts on, and the orbit space of the action may all be noncompact. It is assumed that the action is proper, and…

Differential Geometry · Mathematics 2015-07-28 Peter Hochs , Varghese Mathai

In this paper we show that the multiplicities of holomorphic discrete series representations relatively to reductive subgroups satisfy the credo "Quantization commutes with reduction".

Symplectic Geometry · Mathematics 2012-01-27 Paul-Emile Paradan

Quillen's localization theorem is well known as a fundamental theorem in the study of algebraic K-theory. In this paper, we present its arithmetic analogue for the equivariant K-theory of arithmetic schemes, which are endowed with an action…

Algebraic Geometry · Mathematics 2019-05-15 Shun Tang

The Guillemin-Sternberg conjecture states that "quantisation commutes with reduction" in a specific technical setting. So far, this conjecture has almost exclusively been stated and proved for compact Lie groups $G$ acting on compact…

Mathematical Physics · Physics 2012-06-27 P. Hochs , N. P. Landsman

We compare variants of Anderson Mixing with the Jacobian-Free Newton-Krylov and Broyden methods applied to an instance of the k-eigenvalue formulation of the linear Boltzmann transport equation. We present evidence that one variant of…

Computational Physics · Physics 2015-03-19 Matthew T. Calef , Erin D. Fichtl , James S. Warsa , Markus Berndt , Neil N. Carlson
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