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arXiv 2404.02129gr-qcastro-ph.COhep-phhep-th
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宇宙学常数问题的解

Solution to the cosmological constant problem

David L. Wiltshire

AI总结:

本文提出宇宙学常数Λ是具有跑动耦合的抵消项,通过广义相对论模拟中空洞膨胀动能的单极平均自然产生,无需额外暗能量,并可望解决哈勃张力。

摘要:

我提出一种在观测上和理论上都自洽的宇宙学常数问题解决方案:$Λ$ 是一个抵消项——具有跑动耦合——它平衡了非均匀分布的“小”宇宙空洞膨胀动能的单极天球平均。不需要其他暗能量来源。该解依赖于首次在完全广义相对论框架下对宇宙学模拟中空洞统计的研究(arXiv:2403.15134)。结果与宇宙学反作用的 Timescape 模型参数一致。关键的是,动力学空间曲率表现为动力学空间曲率的时间变化空间梯度,并直接依赖于空洞体积分数。其单极平均生成了宇宙学项。这一结果有可能解决哈勃张力,并为处理其他张力和异常提供新途径。

英文摘要:

I propose an observationally and theoretically consistent resolution of the cosmological constant problem: $Λ$ is a counterterm -- with a running coupling -- that balances the monopole celestial sky average of the kinetic energy of expansion of inhomogeneously distributed `small' cosmic voids. No other dark energy source is required. This solution relies on the first investigation of void statistics in cosmological simulations in full general relativity (arXiv:2403.15134). Results are consistent with parameters of the Timescape model of cosmological backreaction. Crucially, dynamical spatial curvature arises as time-varying spatial gradients of the kinetic spatial curvature, and depends directly on the void volume fraction. Its monopole average generates the cosmological term. This result potentially resolves the Hubble tension and offers new approaches to tackling other tensions and anomalies.

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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