【摘要】： 近年來大量的天文觀測表明宇宙正在加速膨脹。具有負壓強的奇異物質(zhì)暗能量成為了宇宙的主導(dǎo)成分。它均勻地分布在整個空間中,為宇宙的加速膨脹提供原動力。盡管人們對暗能量有了初步的認識,但是對它本質(zhì)的了解卻不多。暗能量已經(jīng)成為了物理學(xué)研究中最重要的問題之一。 論文首先介紹了宇宙學(xué)的背景和標準宇宙學(xué)模型,然后對幾種比較流行的暗能量模型做了簡單介紹。 接著,主要研究有理想流體存在時標量場的動力學(xué)。由一個標量場來推動宇宙加速膨脹的動力學(xué)暗能量模型往往會遇到所謂的精細調(diào)節(jié)以及巧合性問題。為了解決這些問題,可以引入多組分的模型來求解標度解。在本文中,首先介紹標量場暗能量的自治系統(tǒng),然后著重討論了時空彎曲下有理想流體存在時快子暗能量的動力學(xué),并求解標度解,通過對標度解的研究,確定它是穩(wěn)定的還是短暫的。最后分別在開放宇宙和閉合宇宙兩種可能的情況下探討標度解的勢具有什么樣的形式及其演化。 另外,我們也研究和探討暗能量的存在對行星進動角的影響。發(fā)現(xiàn)對于太陽系水星,暗能量對其進動角的貢獻大約為總進動角的萬分之一。因此,期望通過對水星進動的精密觀測,可以推測暗能量的狀態(tài)函數(shù),并以此作為檢驗各種暗能量模型的理論依據(jù)。 最后是總結(jié)與展望,對整篇論文進行總結(jié),并展望未來工作。
[Abstract]:A large number of astronomical observations in recent years have shown that the universe is expanding at an accelerated pace. The dark energy of singular matter with strong negative pressure has become the dominant component of the universe. It distributes evenly throughout the space, providing the impetus for the accelerating expansion of the universe. Although there is a preliminary understanding of dark energy, little is known about its nature. Dark energy has become one of the most important problems in physics. In this paper, the background and standard cosmological models of cosmology are introduced, and then several popular dark energy models are briefly introduced. Then, the dynamics of scalar field in the presence of ideal fluid is studied. Dynamic dark energy models with a scalar field to accelerate the expansion of the universe often encounter so-called fine-tuning and coincidences. In order to solve these problems, a multicomponent model can be introduced to solve the scale solution. In this paper, the autonomous system of dark energy in scalar field is introduced, and then the dynamics of the fast dark energy in the existence of ideal fluid in space-time bending is discussed, and the scalar solution is solved. Make sure it's stable or transient. Finally, in the open universe and the closed universe, we discuss the potential of the scalar solution and its evolution. In addition, we also study and study the influence of dark energy on planetary precession angle. It is found that the contribution of dark energy to the precession angle of Mercury in the solar system is about 1/10000 of the total precession angle. Therefore, it is expected that the state function of dark energy can be inferred through the precise observation of Mercury precession, and this can be used as the theoretical basis for testing various dark energy models. The last part is the summary and prospect of the whole paper, and the prospect of future work.
【學(xué)位授予單位】：南昌大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2010
【分類號】：P145.9

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