Effects of the Quantum Vacuum at a Cosmic Scale and of Dark Energy.

IF 2.1 3区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Entropy Pub Date : 2024-11-30 DOI:10.3390/e26121042

Emilio Santos

引用次数: 0

Abstract

The Einstein equation in a semiclassical approximation is applied to a spherical region of the universe, with the stress-energy tensor consisting of the mass density and pressure of the ΛCDM cosmological model plus an additional contribution due to the quantum vacuum. Expanding the equation in powers of Newton constant G, the vacuum contributes to second order. The result is that at least a part of the acceleration in the expansion of the universe may be due to the quantum vacuum fluctuations.

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宇宙尺度上的量子真空效应和暗能量。

半经典近似的爱因斯坦方程应用于宇宙的球形区域，其中应力-能量张量由ΛCDM宇宙模型的质量密度和压力组成，加上量子真空的额外贡献。用牛顿常数G的幂展开方程，真空对二阶有贡献。结果是，至少有一部分宇宙膨胀的加速可能是由于量子真空涨落。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Entropy PHYSICS, MULTIDISCIPLINARY-

CiteScore

4.90

自引率

11.10%

发文量

1580

审稿时长

21.05 days

期刊介绍： Entropy (ISSN 1099-4300), an international and interdisciplinary journal of entropy and information studies, publishes reviews, regular research papers and short notes. Our aim is to encourage scientists to publish as much as possible their theoretical and experimental details. There is no restriction on the length of the papers. If there are computation and the experiment, the details must be provided so that the results can be reproduced.