Smooth 2-Group Extensions and Symmetries of Bundle Gerbes
Smooth 2-Group Extensions and Symmetries of Bundle Gerbes
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束非洲菊的平滑二群扩张和对称性
DOI:
10.1007/s00220-021-04099-7
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发表时间:
2021
影响因子:
2.4
通讯作者:
Bunk S
中科院分区:
文献类型:
--
作者:
Bunk S
We study bundle gerbes on manifoldsMthat carry an action of a connected Lie groupG. We show that these data give rise to a smooth 2-group extension ofGby the smooth 2-group of hermitean line bundles onM. This 2-group extension classifies equivariant structures on the bundle gerbe, and its non-triviality poses an obstruction to the existence of equivariant structures. We present a new global approach to the parallel transport of a bundle gerbe with connection, and use it to give an alternative construction of this smooth 2-group extension in terms of a homotopy-coherent version of the associated bundle construction. We apply our results to give new descriptions of nonassociative magnetic translations in quantum mechanics and the Faddeev–Mickelsson–Shatashvili anomaly in quantum field theory. We also propose a definition of smooth string 2-group models within our geometric framework. Starting from a basic gerbe on a compact simply-connected Lie groupG, we prove that the smooth 2-group extensions ofGarising from our construction provide new models for the string group ofG.
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DOI:
--
发表时间:
1984
期刊:
影响因子:
--
作者:
L. Faddeev;S. Shatashvili
通讯作者:
S. Shatashvili
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
D. Fiorenza;Christopher L. Rogers;U. Schreiber
通讯作者:
U. Schreiber
DOI:
--
发表时间:
1994
期刊:
影响因子:
--
作者:
A. Carey;M. Murray
通讯作者:
M. Murray
DOI:
--
发表时间:
2019
期刊:
Journal of Physics A: Mathematical and Theoretical
影响因子:
--
作者:
Joe Davighi;B. Gripaios;Joseph Tooby
通讯作者:
Joseph Tooby
影响因子:
5.4
作者:
M. Bojowald;Suddhasattwa Brahma;Umut Büyükçam;T. Strobl
通讯作者:
T. Strobl