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arXiv 0711.3606astro-ph
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第一千一百四十四章震荡本源

Oscillating Quintessence

Je-an Gu

摘要:

提出了一种振荡标量场作为暗能量的精粹模型。幂律势的情况特别有趣,是本文的重点。在这个模型中,暗能量的状态方程w_{OQ}是一个常数,简单地由势的幂n通过w_{OQ} =(n-2)/(n+2)确定。因此,当0 < n < 1时,振荡的精华可以提供排斥引力并驱动宇宙加速度。研究了系统振动的条件和观测约束条件。对于这种新的情况下,一个特定的自然模型少得多的微调。

英文摘要:

An oscillating scalar field as a quintessence model for dark energy is proposed. The case of a power-law potential is particularly intriguing and is the focus of the present article. In this model the equation of state w_{OQ} of dark energy is a constant determined simply by the power n in the potential through w_{OQ} = (n-2)/(n+2). Accordingly, when 0 < n < 1, the oscillating quintessence can provide repulsive gravity and drive the cosmic acceleration. The condition for oscillation and the constraints from observations are investigated. For this new scenario a specific natural model with much less fine tuning is presented.

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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