论文标题
有效的关系GFT宇宙学中的量子波动
Quantum fluctuations in the effective relational GFT cosmology
论文作者
论文摘要
在量子重力的GFT模型的有效关系宇宙学动力学的背景下，我们分析了宇宙学相关的几何观测值的量子波动的大小和演变。我们考虑物质时钟可观察的波动，以测试关系演化图片本身的有效性。接下来，我们计算宇宙体积的量子波动和其他表征其进化的操作员的量子波动（基本GFT量子的数量运算符，有效的哈密顿量和标量场动量）。特别是，我们专注于晚期（时钟）时间状态，在该状态下，动力学与平坦的FRW宇宙兼容，以及基本量子重力动力学产生的量子弹跳附近的早期阶段。
We analyze the size and evolution of quantum fluctuations of cosmologically relevant geometric observables, in the context of the effective relational cosmological dynamics of GFT models of quantum gravity. We consider the fluctuations of the matter clock observables, to test the validity of the relational evolution picture itself. Next, we compute quantum fluctuations of the universe volume and of other operators characterizing its evolution (number operator for the fundamental GFT quanta, effective Hamiltonian and scalar field momentum). In particular, we focus on the late (clock) time regime, where the dynamics is compatible with a flat FRW universe, and on the very early phase near the quantum bounce produced by the fundamental quantum gravity dynamics.
