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arXiv 2407.09595hep-thgr-qc
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量子引力中绕过全局对称性不存在猜想的一种非定域方式?

A non-local way around the no-global-symmetries conjecture in quantum gravity?

Johanna Borissova, Astrid Eichhorn, Shouryya Ray

AI总结:

该研究在洛伦兹路径积分框架下,通过构建基于视界探测曲率不变量逆的非定域引力作用量,实现黑洞构型的相消干涉以抑制虚黑洞,为理解全局对称性不存在猜想的局限性提供了非定域视角的参考。

摘要:

全局对称性不存在猜想是沼泽地计划的核心,该计划用于界定可从量子引力理论导出的有效场论与不可导出的有效场论之间的边界。该猜想指出,路径积分中的虚黑洞构型会产生违反物质有效作用量中所有全局对称性的项。由于其核心地位,理解该猜想的适用局限性至关重要。在时空几何的洛伦兹路径积分框架下,我们探究了虚黑洞构型是否可被动力学抑制。为此,我们在球对称设定下开展研究,并利用在视界处为零的视界探测曲率不变量。通过由此类曲率不变量的逆构建非定域引力作用量,我们能够在路径积分中实现黑洞构型的相消干涉。鉴于非定域引力作用量通常是将物质自由度从量子引力与物质的理论中积分出去的结果,我们的示例性构造强化了关于在路径积分框架下评估量子引力的所谓普适性质时非定域作用的讨论。

英文摘要:

The no-global-symmetries conjecture is central to the swampland program that delineates the boundary between effective field theories that can be obtained from a quantum theory of gravity to those that cannot. The conjecture states that virtual black-hole configurations in the path integral generate terms that violate all global symmetries in the effective action for matter. Because of its central role, it is crucial to understand limitations to the validity of this conjecture. In the context of the Lorentzian path integral over spacetime geometries, we explore whether virtual black-hole configurations can be suppressed dynamically. To that end, we work in a spherically symmetric setting and make use of horizon-detecting curvature invariants which vanish on the horizon. By constructing a non-local gravitational action from the inverse of such curvature invariants, we can achieve destructive interference of black-hole configurations in the path integral. Given that non-local gravitational actions appear generically as the result of integrating out matter degrees of freedom from a theory for quantum gravity and matter, our exemplary construction reinforces discussions about the role of non-locality in assessing arguably universal properties of quantum gravity within the framework of path integrals.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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