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arXiv 1806.08199gr-qchep-th
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具有膨胀子场的多测度模型的宇宙学解

Cosmological Solutions from a Multi-Measure Model with Inflaton Field

Denitsa Staicova, Michail Stoilov

摘要:

在最近的一项工作中,我们证明了一个修改后的重力模型,其中标量“暗子”场耦合到标准黎曼度规和另一个非黎曼体积形式是兼容的观测数据从超新星Ia型。在这里,我们研究了一个更复杂的模型与额外的“暴胀”标量场。数值结果表明,该模型可以定性地再现宇宙的暴胀时代,物质主导时代,并以无缝的方式呈现加速膨胀。我们表明,只有当模型参数在一个非常特定的范围内,这样的解决方案。我们面临的主要数值问题是再现暴胀时期的极小时间。在这里,我们介绍了一些参数的变化如何影响这个时间。

英文摘要:

In a recent work, we demonstrated that a modified gravity model in which a scalar "darkon" field is coupled to both the standard Riemannian metric and to another non-Riemannian volume form is compatible with observational data from Supernovae Type Ia. Here, we investigate a more complicated model with an additional "inflaton" scalar field. We demonstrate numerically that the model can qualitatively reproduce the Universe inflation epoch, matter dominated epoch, and present accelerating expansion in a seamless way. We show that such solutions occur only when the model parameters are within a very particular range. The main numerical problem we are faced with is reproducing the extremely small time of the inflation epoch. Here, we present how the variation of some parameters affects this time.

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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