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  本文選題：粘滯效應(yīng) + 暗能量��； 參考：《遼寧師范大學(xué)》2014年碩士論文

【摘要】：最近幾年的天文觀測表明當(dāng)前的宇宙不僅正在膨脹,而且正經(jīng)歷加速膨脹。解釋何為驅(qū)動宇宙加速膨脹的源動力,已經(jīng)成為當(dāng)今宇宙學(xué)的熱點(diǎn)問題。人們已提出很多理論,其中認(rèn)為最好的候選者是作為暗能量模型的宇宙學(xué)常數(shù),即所謂的真空能。目前已建立多種暗能量模型,但都有著各自的優(yōu)缺點(diǎn)。 本文深入研究了粘滯效應(yīng)對新Agegraphic暗能量(NADE)模型與修正的Chaplygin氣體(MCG)模型重構(gòu)的影響。首先研究了在粘滯效應(yīng)影響下,存在三種不同相互作用時新Agegraphic暗能量態(tài)參數(shù)方程ωq的演化規(guī)律。研究結(jié)果表明,當(dāng)相互作用項(xiàng)取為Q1=3Hb2ρq和Q2=3Hb2ρdm時,實(shí)現(xiàn)了態(tài)參數(shù)ω對Phantom邊界的穿越,粘滯效應(yīng)將推遲Phantom邊界的穿越,并且v值越大,將越推遲穿越。 其次,本文討論了在非平直宇宙中有相互作用的MCG模型,其中暗能量組分為新Agegraphic暗能量的情況。我們分別重構(gòu)了三種不同相互作用下的勢能V(φ)和標(biāo)量場φ(a),并分別對不同相互作用強(qiáng)度下的演化規(guī)律進(jìn)行了研究。 最后,在上述基礎(chǔ)上,我們考慮了粘滯性帶來的影響。具體地,給出了其不同相互作用下的勢能V(φ)和標(biāo)量場φ(a)的重構(gòu)結(jié)果,并對粘滯性給它們的演化規(guī)律帶來的影響進(jìn)行了分析。
[Abstract]:Astronomical observations in recent years have shown that the current universe is not only expanding, but is experiencing accelerated expansion. Explaining what drives the accelerating expansion of the universe has become a hot topic in cosmology. Many theories have been put forward, among which the best candidate is the cosmological constant, the so-called vacuum energy, which is regarded as the dark energy model. A variety of dark energy models have been established, but each has its own advantages and disadvantages. The effects of viscosity on the reconstruction of the new Agegraphic dark energy (nade) model and the modified Chaplygin gas (MCG) model are studied. In this paper, we first study the evolution of the new Agegraphic dark energy parameter equation 蠅 Q under the influence of viscous effect. The results show that when the interaction terms are Q _ (1) H _ (3) H _ (2) 蟻 _ Q and Q _ (2) H _ (3) H _ (2) 蟻 _ (DM), the crossing of the Phantom boundary is realized by the state parameter 蠅, and the viscosity effect will delay the crossing of the Phantom boundary, and the greater the v value, the longer the crossing. Secondly, in this paper, we discuss the model of MCG with interaction in a non-planar universe, where the dark energy component is a new Agegraphic dark energy. We reconstruct the potential energy V (蠁) and scalar field 蠁 (a), of three different interactions, and study the evolution of the potential energy V (蠁) and the scalar field 蠁 (a), respectively. Finally, on the basis of the above, we consider the effect of viscosity. In detail, the reconstruction results of potential energy V (蠁) and scalar field 蠁 (a) under different interactions are given, and the influence of viscosity on their evolution is analyzed.
【學(xué)位授予單位】：遼寧師范大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：P159

【共引文獻(xiàn)】

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1 M.Sharif;Sehrish Azeem;;Dark Energy Models and Cosmic Acceleration with Anisotropic Universe in f(T) Gravity[J];Communications in Theoretical Physics;2014年04期

2 A.Sheykhi;H.Alavirad;A.Bagheri;E.Ebrahimi;;Quintessence Reconstruction of Interacting HDE in a Non-Flat Universe[J];Communications in Theoretical Physics;2014年06期

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7 M.Sharif;Saima Jabbar;;Phase Space Analysis and Anisotropic Universe Model in f(T) Gravity[J];Communications in Theoretical Physics;2015年02期

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1 黃鵬;暗能量與f（T）引力相關(guān)問題研究[D];北京工業(yè)大學(xué);2013年

2 王鈺婷;暗能量的擾動和積分的Sachs-Wolfe效應(yīng)[D];大連理工大學(xué);2013年

3 苗榮欣;全息的引力和全息暗能量的理論研究[D];中國科學(xué)技術(shù)大學(xué);2014年

4 黃卓鵬;一類全息型暗能量模型的研究[D];國防科學(xué)技術(shù)大學(xué);2012年

5 趙月月;廣義f(R)引力及其它修正引力相關(guān)問題的理論研究[D];遼寧師范大學(xué);2014年

6 況小梅;AdS/CFT對偶理論及其在凝聚態(tài)物理中的應(yīng)用[D];上海交通大學(xué);2014年

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1 王，

本文編號：2099810