【摘要】 利用高导数引力理论研究宇宙的演化.在Friedmann宇宙模型中,由高导数场方程导出宇宙动力学方程.此方程为宇宙标度因子关于时间的三阶非线性微分方程,并由能量-动量守恒及物态方程导出能量密度和宇宙标度因子的关系,最后比较了高导数引力理论动力学方程和标准动力学方程.更多还原

【Abstract】 The evolvement of cosmology is studied in the framework of higher-derivative theory of gravitation. The dynamic equation of universe is derived from the higher-derivative field equation of gravitation in the case of homogeneous universe. The dynamic equation is a nonlinearized three-order differential equation with respective to time, and the relation between density of energy and scalar factor is gotten from the conservation law of energy-momentum tensor and the equation of state. At last compare the higher-derivative dynamic equation with the standard dynamic equation.更多还原