标题： 关于Jordan-Brans-Dicke静态宇宙的稳定性 显示英文标题

标题： On the Stability of Jordan-Brans-Dicke Static Universe

摘要： 在这项工作中，我们研究了Jordan-Brans-Dicke（JBD）静态宇宙的稳定性。这是由于有可能在所谓的涌现宇宙场景中，宇宙可能以渐近JBD静态状态开始。我们通过考虑空间均匀的IX型Bianchi各向异性扰动模式，并包括更一般的完美流体，扩展了我们之前关于JBD静态宇宙稳定性的结果。与广义相对论相反，我们发现由标准完美流体主导的JBD静态宇宙可能对各向同性和各向异性扰动都是稳定的。讨论了这些结果对宇宙初始状态及其预膨胀演化的影响。 显示英文摘要

摘要： In this work we study the stability of the Jordan-Brans-Dicke (JBD) static universe. This is motivated by the possibility that the universe might have started out in an asymptotically JBD static state, in the context of the so called emergent universe scenario. We extent our previous results on stability of JBD static universe by considering spatially homogeneous Bianchi type IX anisotropic perturbation modes and by including more general perfect fluids. Contrary to general relativity, we have found that the JBD static universe, dominated by a standard perfect fluid, could be stable against isotropic and anisotropic perturbations. The implications of these results for the initial state of the universe and its pre-inflationary evolution are discussed.