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arXiv 0712.0465gr-qcastro-ph
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加速量子宇宙

Accelerating Quantum Universe

V. E. Kuzmichev, V. V. Kuzmichev

摘要:

在均匀、各向同性、封闭宇宙的量子模型中研究了负压流体(暗能量)的起源,宇宙中充满了均匀标量场和定义了参考系的理想流体.该模型的方程简化为允许它们与爱因斯坦经典引力理论的方程进行直接比较的形式。结果表明,量子化的标量场具有凝聚态的形式,表现为反引力介质。该理论预言,即使真空能量密度消失,宇宙也会加速膨胀。凝聚体的反引力效应具有纯粹的量子性质。结果表明,当宇宙参数接近普朗克宇宙参数时,宇宙可以经历指数膨胀期。确定了在半经典近似下宇宙看起来像是具有负减速参数的空间平坦的条件。讨论了经典宇宙学的标准模型的简化。

英文摘要:

The origin of negative pressure fluid (the dark energy) is investigated in the quantum model of the homogeneous, isotropic and closed universe filled with a uniform scalar field and a perfect fluid which defines a reference frame. The equations of the model are reduced to the form which allows a direct comparison between them and the equations of the Einsteinian classical theory of gravity. It is shown that quantized scalar field has a form of a condensate which behaves as an antigravitating medium. The theory predicts an accelerating expansion of the universe even if the vacuum energy density vanishes. An antigravitating effect of a condensate has a purely quantum nature. It is shown that the universe with the parameters close to the Planck ones can go through the period of exponential expansion. The conditions under which in semi-classical approximation the universe looks effectively like spatially flat with negative deceleration parameter are determined. The reduction to the standard model of classical cosmology is discussed.

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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