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Locally toric manifolds and singular Bohr-Sommerfeld leaves

About this Title

Mark D. Hamilton, Department of Mathematics, University of Toronto, 40 St. George St., Toronto, Ontario, Canada M5S 2E4

Publication: Memoirs of the American Mathematical Society
Publication Year: 2010; Volume 207, Number 971
ISBNs: 978-0-8218-4714-5 (print); 978-1-4704-0585-4 (online)
DOI: https://doi.org/10.1090/S0065-9266-10-00583-1
Published electronically: March 3, 2010
Keywords: Toric manifold, geometric quantization, real polarization, Bohr-Sommerfeld
MSC: Primary 53D50

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Table of Contents

Chapters

  • 1. Introduction
  • 2. Background
  • 3. The cylinder
  • 4. The complex plane
  • 5. Example: $S^2$
  • 6. The multidimensional case
  • 7. A better way to calculate cohomology
  • 8. Piecing and glueing
  • 9. Real and Kähler polarizations compared

Abstract

When geometric quantization is applied to a manifold using a real polarization which is “nice enough”, a result of Śniatycki says that the quantization can be found by counting certain objects, called Bohr-Sommerfeld leaves. Subsequently, several authors have taken this as motivation for counting Bohr-Sommerfeld leaves when studying the quantization of manifolds which are less “nice”.

In this paper, we examine the quantization of compact symplectic manifolds that can locally be modelled by a toric manifold, using a real polarization modelled on fibres of the moment map. We compute the results directly, and obtain a theorem similar to Śniatycki’s, which gives the quantization in terms of counting Bohr-Sommerfeld leaves. However, the count does not include the Bohr-Sommerfeld leaves which are singular. Thus the quantization obtained is different from the quantization obtained using a Kähler polarization.

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