Exact-WKB, complete resurgent structure, and mixed anomaly in quantum mechanics on S 1

Naohisa Sueishi (Department of Physics, Nagoya University, Nagoya, 464-8602, Japan) ; Syo Kamata (National Centre for Nuclear Research, Warsaw, 02-093, Poland) ; Tatsuhiro Misumi (Department of Mathematical Science, Akita University, Akita, 010-8502, Japan; Department of Physics, Keio University, Kanagawa, 223-8521, Japan) ; Mithat Ünsal (Department of Physics, North Carolina State University, Raleigh, NC, 27607, USA)

We investigate the exact-WKB analysis for quantum mechanics in a periodic potential, with N minima on S 1. We describe the Stokes graphs of a general potential problem as a network of Airy-type or degenerate Weber-type building blocks, and provide a dictionary between the two. The two formulations are equivalent, but with their own pros and cons. Exact-WKB produces the quantization condition consistent with the known conjectures and mixed anomaly. The quantization condition for the case of N-minima on the circle factorizes over the Hilbert sub-spaces labeled by discrete theta angle (or Bloch momenta), and is consistent with ’t Hooft anomaly for even N and global inconsistency for odd N. By using Delabaere-Dillinger-Pham formula, we prove that the resurgent structure is closed in these Hilbert subspaces, built on discrete theta vacua, and by a transformation, this implies that fixed topological sectors (columns of resurgence triangle) are also closed under resurgence.

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      "source": "Springer", 
      "value": "We investigate the exact-WKB analysis for quantum mechanics in a periodic potential, with N minima on S 1. We describe the Stokes graphs of a general potential problem as a network of Airy-type or degenerate Weber-type building blocks, and provide a dictionary between the two. The two formulations are equivalent, but with their own pros and cons. Exact-WKB produces the quantization condition consistent with the known conjectures and mixed anomaly. The quantization condition for the case of N-minima on the circle factorizes over the Hilbert sub-spaces labeled by discrete theta angle (or Bloch momenta), and is consistent with \u2019t Hooft anomaly for even N and global inconsistency for odd N. By using Delabaere-Dillinger-Pham formula, we prove that the resurgent structure is closed in these Hilbert subspaces, built on discrete theta vacua, and by a transformation, this implies that fixed topological sectors (columns of resurgence triangle) are also closed under resurgence."
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Published on:
15 July 2021
Publisher:
Springer
Published in:
Journal of High Energy Physics , Volume 2021 (2021)
Issue 7
Pages 1-41
DOI:
https://doi.org/10.1007/JHEP07(2021)096
arXiv:
2103.06586
Copyrights:
The Author(s)
Licence:
CC-BY-4.0

Fulltext files: