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  Refined algebraic quantization in the oscillator representation of SL(2,R)

Louko, J., & Rovelli, C. (2000). Refined algebraic quantization in the oscillator representation of SL(2,R). Journal of Mathematical Physics, 41(1), 132-155. doi:10.1063/1.533126.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-5761-9 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-5762-7
Genre: Journal Article

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 Creators:
Louko, Jorma1, Author
Rovelli, Carlo, Author
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1Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24014              

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 Abstract: We investigate Refined Algebraic Quantization (RAQ) with group averaging in a constrained Hamiltonian system with unreduced phase space T^*R^4 and gauge group SL(2,R). The reduced phase space M is connected and contains four mutually disconnected `regular' sectors with topology R x S^1, but these sectors are connected to each other through an exceptional set where M is not a manifold and where M has non-Hausdorff topology. The RAQ physical Hilbert space H_{phys} decomposes as H_{phys} = (direct sum of) H_i, where the four subspaces H_i naturally correspond to the four regular sectors of M. The RAQ observable algebra A_{obs}, represented on H_{phys}, contains natural subalgebras represented on each H_i. The group averaging takes place in the oscillator representation of SL(2,R) on L^2(R^{2,2}), and ensuring convergence requires a subtle choice for the test state space: the classical analogue of this choice is to excise from M the exceptional set while nevertheless retaining information about the connections between the regular sectors. A quantum theory with the Hilbert space H_{phys} and a finitely-generated observable subalgebra of A_{obs} is recovered through both Ashtekar's Algebraic Quantization and Isham's group theoretic quantization.

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 Dates: 2000-01
 Publication Status: Published in print
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 Identifiers: eDoc: 206209
URI: http://arxiv.org/abs/gr-qc/9907004
Other: arXiv:gr-qc/9907004v4
DOI: 10.1063/1.533126
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Title: Journal of Mathematical Physics
Source Genre: Journal
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Pages: - Volume / Issue: 41 (1) Sequence Number: - Start / End Page: 132 - 155 Identifier: ISSN: 0022-2488