论文标题
关于气泡墙上宇宙学的评论
A comment about the cosmology on a bubble wall
论文作者
论文摘要
真实广告的大气泡之间的接口$ _d $ vacuum在虚假广告中扩展了$ _d $ vacuum，这是一个充气$ d-1 $ dimensional Universe的型号。它看起来像是研究通货膨胀基础的有趣设置。最近的一项计算表明，该模型对宇宙波函数的预测与Hartle和Hawking的波动不同意。我们表明，这种差异是因为该模型的有效$ D-1 $维数描述为$ 0 $（Nordström）重力，而不是Spin-2（Einstein）重力。
The interface between a big bubble of true AdS$_D$ vacuum expanding inside a false AdS$_D$ vacuum is a model of an inflating $D-1$ dimensional universe. It looks like an interesting setup to study fundamentals of inflation. A recent computation shows that the prediction of this model for the wavefunction of the universe disagrees with that of Hartle and Hawking. We show that this discrepancy is because the effective $D-1$ dimensional description of the model is spin-$0$ (Nordström) gravity rather than spin-2 (Einstein) gravity.
