Abstract 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 which 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.&amp;#xD;In the context of the Lorentzian path integral over spacetime geometries, we explore whether virtual black-hole configurations can be suppressed dynamically. &amp;#xD;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 action from the inverse of such curvature invariants, we can achieve destructive interference of black-hole configurations in the path integral.

Johanna N. Borissova

Astrid Eichhorn

Shouryya Ray

Classical and Quantum Gravity

CLASSICAL AND QUANTUM GRAVITY 是引力和时空理论领域的物理学家、数学家和宇宙学家的知名期刊。该杂志现在是公认的经典相对论和量子引力所有领域的世界领导者。

Classical and Quantum Gravity is a renowned journal in the field of gravity and spacetime theory, widely recognized by physicists, mathematicians, and cosmologists. The journal is acknowledged as a world leader in all areas of classical relativity and quantum gravity.

《Classical and Quantum Gravity》是引力和时空理论领域的知名期刊，受到物理学家、数学家和宇宙学家的广泛认可。该杂志被公认为经典相对论和量子引力各个领域的全球领导者。

Category	Quartile
物理与天体物理	3
物理与天体物理, 天文与天体物理	3
物理与天体物理, 物理综合	3
物理与天体物理, 物理粒子与场物理	4
物理与天体物理, 量子科技	4

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

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