论文标题
从边界项和重力的非经典性的宇宙学扰动的破坏性
Decoherence of Cosmological Perturbations from Boundary Terms and the Non-Classicality of Gravity
论文作者
论文摘要
我们注意到，通胀曲率扰动$ζ$的破坏性由重力作用的边界项主导。尽管此边界项不能影响宇宙相关器$ \ left \ langle prangeζ^n \ right \ rangle $，但它诱导的$ζ$比以前的计算更快。通货膨胀的重力起源揭示了重力的量子（或非古典）性质。通过与经典重力的Schrödinger-Newton玩具模型进行比较，我们表明，可以通过比较它们对$ζ$的腐蚀率的不同影响来区分古典或量子起源的重力理论。我们的计算还表明，密度波动$Δρ$比$ζ$更好地保存量子信息，以构建类似宇宙的钟形实验。
We note that the decoherence of inflationary curvature perturbation $ζ$ is dominated by a boundary term of the gravity action. Although this boundary term cannot affect cosmological correlators $\left\langle ζ^n \right\rangle$, it induces much faster decoherence for $ζ$ than that of previous calculations. The gravitational origin of inflationary decoherence sheds light on the quantum (or non-classical) nature of gravity. By comparing with a Schrödinger-Newton toy model of classical gravity, we show that gravity theories of classical or quantum origins can be distinguished by comparing their different impacts on decoherence rate of $ζ$. Our calculation also indicates that density fluctuation $δρ$ better preserves quantum information than $ζ$ for the purpose of constructing cosmological Bell-like experiments.
