【摘要】： 近年來(lái)大量的天文觀測(cè)表明宇宙正在加速膨脹。具有負(fù)壓強(qiáng)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(gè)空間中,為宇宙的加速膨脹提供原動(dòng)力。盡管人們對(duì)暗能量有了初步的認(rèn)識(shí),但是對(duì)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(wèn)題之一。 論文首先介紹了宇宙學(xué)的背景和標(biāo)準(zhǔn)宇宙學(xué)模型,然后對(duì)幾種比較流行的暗能量模型做了簡(jiǎn)單介紹。 接著,主要研究有理想流體存在時(shí)標(biāo)量場(chǎng)的動(dòng)力學(xué)。由一個(gè)標(biāo)量場(chǎng)來(lái)推動(dòng)宇宙加速膨脹的動(dòng)力學(xué)暗能量模型往往會(huì)遇到所謂的精細(xì)調(diào)節(jié)以及巧合性問(wèn)題。為了解決這些問(wèn)題,可以引入多組分的模型來(lái)求解標(biāo)度解。在本文中,首先介紹標(biāo)量場(chǎng)暗能量的自治系統(tǒng),然后著重討論了時(shí)空彎曲下有理想流體存在時(shí)快子暗能量的動(dòng)力學(xué),并求解標(biāo)度解,通過(guò)對(duì)標(biāo)度解的研究,確定它是穩(wěn)定的還是短暫的。最后分別在開(kāi)放宇宙和閉合宇宙兩種可能的情況下探討標(biāo)度解的勢(shì)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(duì)行星進(jìn)動(dòng)角的影響。發(fā)現(xiàn)對(duì)于太陽(yáng)系水星,暗能量對(duì)其進(jìn)動(dòng)角的貢獻(xiàn)大約為總進(jìn)動(dòng)角的萬(wàn)分之一。因此,期望通過(guò)對(duì)水星進(jìn)動(dòng)的精密觀測(cè),可以推測(cè)暗能量的狀態(tài)函數(shù),并以此作為檢驗(yàn)各種暗能量模型的理論依據(jù)。 最后是總結(jié)與展望,對(duì)整篇論文進(jìn)行總結(jié),并展望未來(lái)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(jí)別】：碩士
【學(xué)位授予年份】：2010
【分類號(hào)】：P145.9

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1 李競(jìng);大爆炸(Big Bang)和暗能量(dark energy)[J];科技術(shù)語(yǔ)研究;2003年04期

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