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arXiv 2103.02720gr-qcastro-ph.CO
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牛顿-汤川重力模型中的无压稳态解

Pressureless stationary solutions in a Newton-Yukawa gravity model

T. D. Ferreira, J. Novo, N. A. Silva, A. Guerreiro, O. Bertolami

摘要:

非最小耦合曲率-物质引力模型是广义相对论的一个有趣的替代方案,可以用来解决暗能量和暗物质的宇宙学问题。这些模型具有复杂的场方程,无法进行全面的分析研究。尽管如此,在特定的限制下,在这些模型中,物质分布的行为可以用薛定谔-牛顿系统来描述。在非线性光学中,薛定谔-牛顿系统可用于解决各种相关情况,并为此开发了几种数值工具。有趣的是,这些方法可以适用于研究广义相对论问题以及它的扩展。在这项工作中,我们报告使用这些数值工具来研究一个特定的非最小耦合模型,引入了两个新的潜力,一个有吸引力的汤川势和一个排斥势成正比的能量密度。利用时间-时间传播方法,我们已经表明,即使在低能量密度制度,稳定的解决方案。

英文摘要:

Non-minimally coupled curvature-matter gravity models are an interesting alternative to the Theory of General Relativity and to address the dark energy and dark matter cosmological problems. These models have complex field equations that prevent a full analytical study. Nonetheless, in a particular limit, the behavior of a matter distribution can, in these models, be described by a Schrödinger-Newton system. In nonlinear optics, the Schrödinger-Newton system can be used to tackle a wide variety of relevant situations and several numerical tools have been developed for this purpose. Interestingly, these methods can be adapted to study General Relativity problems as well as its extensions. In this work, we report the use of these numerical tools to study a particular non-minimal coupling model that introduces two new potentials, an attractive Yukawa potential and a repulsive potential proportional to the energy density. Using the imaginary-time propagation method we have shown that stationary solutions arise even at low energy density regimes.

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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