论文标题
旋转宇宙学：经典和量子
Rotating cosmologies: classical and quantum
论文作者
论文摘要
我们在小型苏珀斯空间框架内在空间上进行了平坦的各向异性宇宙学。我们特别强调了迷你空间动作的对称性和相关的保护法，我们推出了由固体物质驱动的新的旋转宇宙学。它们的旋转是物理的，因为它以保守的角动量的形式以一种不变的方式表征。一路上，我们确认了Bartolo等人的结果。关于固体通胀的各向异性衰减的缓慢衰减。然后，我们使用MinisuperSpace方法作为实验室来解决这些量子宇宙学的某些难题 - 如何在宇宙波函数水平上表征量子状态的时空对称性。对于坚实的驱动宇宙学的情况，这个问题似乎比在更多标准案例中更好。但是，其他问题仍未得到答复。特别是，如何操作如何在量子水平上保持一致的自由度截断的一般问题。
We revisit spatially flat, anisotropic cosmologies within the framework of mini-superspace. Putting special emphasis on the symmetries of the mini-superspace action and on the associated conservation laws, we unveil a new class of rotating cosmologies driven by solid matter. Their rotating is physical, in that it is characterized in an invariant way in terms of a conserved angular momentum. Along the way, we confirm the results of Bartolo et al. regarding the slow decay of anisotropies for solid inflation. We then use our minisuperspace approach as a laboratory to address certain puzzles of quantum cosmology-among these, how to characterize the spacetime symmetries of a quantum state at the level of the wavefunction of the universe. For the case of a solid driven cosmology, this question seems better defined than in more standard cases. Other questions remain unanswered, though; in particular, the general question of how to operate a minisuperspace-like truncation of degrees of freedom that is consistent at the quantum level.
