标题： 由于动力学挠率自发紧致化为罗伯逊-沃克宇宙 显示英文标题

标题： Spontaneous Compactification to Robertson-Walker Universe Due To Dynamical Torsion

摘要： 我们研究了具有Gauss-Bonnet项且额外维度空间具有挠率的多维引力理论，所选择的额外维度空间为简单李群的群流形。 我们对四维时空采用Robertson-Walker假设，并研究标量场和挠率场的势能。 结果表明，对于初始理论的某些参数值，该势能具有经典稳定的极小值，对应于额外维度的自发紧致化。 然而，这些极小值具有零挠率。 显示英文摘要

摘要： We investigate multidimensional gravity with the Gauss-Bonnet term and with torsion on the space of extra dimensions chosen to be the group manifold of a simple Lie group. We take the Robertson-Walker ansatz for the 4-dimensional space-time and study the potential of a dilaton and torsion fields. It is shown that for certain values of the parameters of the initial theory the potential has classically stable minima, corresponding to the spontaneous compactification of the extra dimensions. However, these minima have zero torsion.