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Coherent states and the quantization of 1+1-dimensional Yang-Mills theory

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Referee this paper: arXiv:quant-ph/0012050v3 by Brian C. Hall

Please use comments to point to previous work in this direction, and reviews to referee the accuracy of the paper. Feel free to edit this submission to summarise the paper (just click on edit, your summary will then appear under the horizontal line)

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This 2000 paper by B.C. Hall discusses the canonical quantization of 1+1-dimensional Yang-Mills theory on a spacetime cylinder, from the point of view of coherent states, or equivalently, the Segal-Bargmann transform.

''Before gauge symmetry is imposed, the coherent states are simply ordinary coherent states labeled by points in an infinite-dimensional linear phase space. Gauge symmetry is imposed by projecting the original coherent states onto the gauge-invariant subspace, using a suitable regularization procedure. We obtain in this way a new family of reduced coherent states labeled by points in the reduced phase space, which in this case is simply the cotangent bundle of the structure group K. 
The main result explained here, obtained originally in a joint work of the author with B. Driver, is this: The reduced coherent states are precisely those associated to the generalized Segal-Bargmann transform for K, as introduced by the author from a different point of view. This result agrees with that of K. Wren, who uses a different method of implementing the gauge symmetry. The coherent states also provide a rigorous way of making sense out of the quantum Hamiltonian for the unreduced system. 
Various related issues are discussed, including the complex structure on the reduced phase space and the question of whether quantization commutes with reduction.''

summarized by Arnold Neumaier
paper authored Dec 12, 2000 to Reviews I by  (no author on PO assigned yet) 
  • [ revision history ]
    edited Aug 27, 2014 by Arnold Neumaier

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