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Evolution Research in Some Different Cosmology Model

Author: PangZhaoGuang
Tutor: HuangYongChang
School: Beijing University of Technology
Course: Theoretical Physics
Keywords: Einstein's equations The density of matter Skyrocketing Universe
CLC: P159
Type: Master's thesis
Year: 2003
Downloads: 170
Quote: 0
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Abstract


In this paper, the cosmology of the proposed process and its background , an overview of the current cosmological model - the main point of the standard cosmological model and observational evidence , and summed up the problem in the standard cosmological model and solve these problems proposed inflationary universe theory . Discussion of the problem of the origin of the universe and its corresponding quantum cosmology . Extreme relativistic density distribution and the distribution of non - relativistic density mixed in any proportion of a general density distribution , this new distribution given the evolution of the universe and the various parameters ( such as the density parameter , the cosmological constant , any proportion the relationship between the relevant parameters, etc.) and is specifically expressed on the curve . Solving the general standard cosmological model equations , the general solution of the the inflationary universe evolution equation in the case of different density material obtained general expression of the density of matter , a general solution to characterize the different evolution of the cosmic scale factor solution and standard cosmological equations to solve different situations , to prove that the positive and negative values ??of the parameters directly affect the expression of the form of the cosmic scale factor . Found that for the first time when the cosmological constant contribution to the material density is greater than zero index type of composite function was generally skyrocketing cosine form of the cosmological constant contribution to the density is less than zero universe 's evolution . The calculation of the pressure and temperature of the universe , new expressions of pressure and the temperature of the inflationary universe model the time evolution of the expression . Basis the general Lagrangian representation of quantum cosmology , given the constraints under the general form of the Wheeler-De Witt equation on different forms when given concrete expression of the corresponding Wheeler-De Witt equation . Wheeler-De Witt equation based on the theory of Brans-De Witt , given a promotional model , and the Wheeler-De Witt equation is solved , given its physical meaning .

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CLC: > Astronomy,Earth Sciences > Astronomy > Stellar astronomy,galactic astronomy,cosmology > Cosmology
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