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arXiv 2303.04009gr-qcastro-ph.CO
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Rastall引力与Einstein引力等价性中的宇宙流体

Cosmological fluids in the equivalence between Rastall and Einstein gravity

Javier Chagoya, López-Domínguez, C. Ortiz

摘要:

拉斯特尔引力是一个修正的引力理论,它包含了一个非守恒的能量动量张量(EMT)。我们研究了Rastall引力和广义相对论之间的等价性,分析了它对暗物质和暗能量的EMT的影响。我们发现,之间的翻译Rastall和爱因斯坦的解释修改状态方程的每个组件。例如,冷的暗物质可以转化为热的暗物质。如果允许EMT组件交互,则平移也会改变组件之间的交互类型。

英文摘要:

Rastall gravity is a modified gravity proposal that incorporates a non-conserved energy momentum tensor (EMT). We study the equivalence between Rastall gravity and general relativity, analyzing its consequences for an EMT of dark matter and dark energy. We find that the translation between the Rastall and Einstein interpretations modifies the equation of state for each component. For instance, cold dark matter can translate into warm dark matter. If the EMT components are allowed to interact, the translation also changes the type of interaction between the components.

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