Chern-Weil global symmetries and how quantum gravity avoids them
Chern-Weil global symmetries and how quantum gravity avoids them
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陈-韦尔全局对称性以及量子引力如何避免它们
DOI:
10.1007/jhep11(2021)053
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发表时间:
2021
影响因子:
5.4
通讯作者:
Valenzuela, Irene
中科院分区:
文献类型:
--
作者:
Heidenreich, Ben;McNamara, Jacob;Montero, Miguel;Reece, Matthew;Rudelius, Tom;Valenzuela, Irene
We draw attention to a class of generalized global symmetries, which we call “Chern-Weil global symmetries,” that arise ubiquitously in gauge theories. The Noether currents of these Chern-Weil global symmetries are given by wedge products of gauge field strengths, such as F 2∧ H 3 and tr (), and their conservation follows from Bianchi identities. As a result, they are not easy to break. However, it is widely believed that exact global symmetries are not allowed in a consistent theory of quantum gravity. As a result, any Chern-Weil global symmetry in a low-energy effective field theory must be either broken or gauged when the theory is coupled to gravity. In this paper, we explore the processes by which Chern-Weil symmetries may be broken or gauged in effective field theory and string theory. We will see that many familiar phenomena in string theory, such as axions, Chern-Simons terms, worldvolume degrees of freedom, and branes ending on or dissolving in other branes, can be interpreted as consequences of the absence of Chern-Weil symmetries in quantum gravity, suggesting that they might be general features of quantum gravity. We further discuss implications of breaking and gauging Chern-Weil symmetries for particle phenomenology and for boundary CFTs of AdS bulk theories. Chern-Weil global symmetries thus offer a unified framework for understanding many familiar aspects of quantum field theory and quantum gravity.
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DOI:
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发表时间:
2009
期刊:
影响因子:
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作者:
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通讯作者:
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DOI:
10.1002/prop.201800020
发表时间:
2018-02
期刊:
Fortschritte der Physik
影响因子:
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作者:
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DOI:
10.21468/scipostphys.7.5.058
发表时间:
2019
期刊:
SciPost Phys.
影响因子:
--
作者:
Yuji Tachikawa;Kazuya Yonekura
通讯作者:
Kazuya Yonekura
影响因子:
5.4
作者:
D. Brennan;Clay Córdova
通讯作者:
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