标题： 宇宙学中的量子物质和经典引力场：配置空间系综的方法 显示英文标题

标题： Cosmology with quantum matter and a classical gravitational field: the approach of configuration-space ensembles

摘要： 我考虑由经典引力场与量子化的大质量标量场在配置空间系综形式下的相互作用构成的混合宇宙模型。 这是一种可行的方法，为半经典引力提供了替代方案。 我讨论了一个特定的、高度非经典的解，在两种近似情况下，即最小超空间和球对称中等超空间。 在两种情况下，量子标量场与经典引力场的耦合导致了一个宇宙半径量子化的宇宙模型。 显示英文摘要

摘要： I consider the formulation of hybrid cosmological models that consists of a classical gravitational field interacting with a quantized massive scalar field in the formalism of ensembles on configuration space. This is a viable approach that provides an alternative to semiclassical gravity. I discuss a particular, highly nonclassical solution in two approximations, minisuperspace and spherically-symmetric midisuperspace. In both cases, the coupling of the quantum scalar field and classical gravitational field leads to a cosmological model which has a quantized radius of the universe.