Quantization maps, algebra representation, and noncommutative Fourier transform for Lie groups
The phase space given by the cotangent bundle of a Lie group appears in the context of several models for physical systems. A representation for the quantum system in terms of noncommutative functions on the (dual) Lie algebra, and a generalized notion of (noncommutative) Fourier transform, different from standard harmonic analysis, has been recently developed, and found several applications, especially in the quantum gravity literature. We show that this algebra representation can be defined on the sole basis of a quantization map of the classical Poisson algebra, and identify the conditions for its existence. In particular, the corresponding noncommutative starproduct carried by this representation is obtained directly from the quantization map via deformation quantization. We then clarify under which conditions a unitary intertwiner between such algebra representation and the usual group representation can be constructed giving rise to the noncommutative plane waves and consequently, the noncommutative Fourier transform. The compact groups U(1) and SU(2) are considered for different choices of quantization maps, such as the symmetric and the Duflo map, and we exhibit the corresponding starproducts, algebra representations, and noncommutative plane waves.
 Authors:

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 Max Planck Institute for Gravitational Physics (Albert Einstein Institute), Am Mühlenberg 1, 14476 Potsdam (Germany)
 (France)
 Publication Date:
 OSTI Identifier:
 22224162
 Resource Type:
 Journal Article
 Resource Relation:
 Journal Name: Journal of Mathematical Physics; Journal Volume: 54; Journal Issue: 8; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ALGEBRA; FOURIER TRANSFORMATION; MAPS; PHASE SPACE; POISSON EQUATION; QUANTIZATION; QUANTUM GRAVITY; SU2 GROUPS; UNITARY SYMMETRY; WAVE PROPAGATION