论文标题
循环量子重力，签名更改和无规律的建议
Loop quantum gravity, signature change, and the no-boundary proposal
论文作者
论文摘要
循环量子重力的协变模型通常意味着高密度下的动态特征变化。本文介绍了详细的推导，这些推导表明了这种新型的签名变化与量子宇宙学的波功能的富有成效的相互作用，例如无势力和隧道提案。特别是，在洛伦兹（Lorentzian）路径综合治疗中发现的不均匀扰动的不稳定性是自然治愈的。重要的是，当相关时，动态签名变化不需要普朗克密度。
Covariant models of loop quantum gravity generically imply dynamical signature change at high density. This article presents detailed derivations that show the fruitful interplay of this new kind of signature change with wave-function proposals of quantum cosmology, such as the no-boundary and tunneling proposals. In particular, instabilities of inhomogeneous perturbations found in a Lorentzian path-integral treatment are naturally cured. Importantly, dynamical signature change does not require Planckian densities when off-shell instantons are relevant.
