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arXiv 2602.00524gr-qc

零Raychaudhuri方程与单模引力中可穿越虫洞的不可能性

Null Raychaudhuri Equation and the Impossibility of Traversable Wormholes in Unimodular Gravity

Universidad de Santiago de Chile(智利圣地亚哥大学);Pontificia Universidad Católica de Valparaíso(天主教瓦帕拉索大学)

Erick Pastén, Marco Bosquez, Norman Cruz

AI总结:

基于Raychaudhuri方程推导虫洞喉道的局部协变零散焦条件,证明单模引力中任何可穿越虫洞必然违反零能量条件,建立局部不可行定理。

摘要:

我们将虫洞喉道的可穿越性表述为从Raychaudhuri方程导出的局部协变零散焦条件。由于单模引力保留了时空的局部几何结构,测地线族的零聚焦性质相对于广义相对论保持不变。我们证明,在单模引力中,任何真正可穿越的虫洞必然违反零能量条件,从而在此框架内建立了由普通物质支撑的虫洞的局部不可行定理。

英文摘要:

We formulate the traversability of wormhole throats as a local and covariant null defocusing condition derived from the Raychaudhuri equation. Since unimodular gravity preserves the local geometric structure of spacetime, the null focusing properties of geodesic congruences are unchanged with respect to general relativity. We show that any genuinely traversable wormhole in unimodular gravity necessarily violates the null energy condition, establishing a local no--go theorem for wormholes supported by ordinary matter in this framework.

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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