arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0704.0756hep-thastro-phhep-ph
收藏

膜世界中的动态Casimir效应

The dynamical Casimir effect in braneworlds

Ruth Durrer, Marcus Ruser

摘要:

在膜世界宇宙学中,膨胀的宇宙被认为是一个在扭曲的高维时空中运动的膜。就像一面移动的镜子会从真空涨落中产生光子一样,一个移动的膜会导致引力子的产生。我们表明,非常一般地,卡鲁扎-克莱因(KK)粒子的尺度像刚性物质与宇宙的膨胀,因此不能代表暗物质在一个扭曲的braneworld。本文给出了在五维反德西特空间中弹跳膜产生无质量和KK引力子的结果。我们发现,对于一个现实的反弹,从所产生的引力子的反作用将是最有可能相关。这封信总结了主要的结果和结论,从数值模拟中详细介绍了在一个长的文件[M。Durrer,Phys. Rev. D 76,104014(2007),arXiv:0704.0790]

英文摘要:

In braneworld cosmology the expanding Universe is realized as a brane moving through a warped higher-dimensional spacetime. Like a moving mirror causes the creation of photons out of vacuum fluctuations, a moving brane leads to graviton production. We show that, very generically, Kaluza-Klein (KK) particles scale like stiff matter with the expansion of the Universe and can therefore not represent the dark matter in a warped braneworld. We present results for the production of massless and KK gravitons for bouncing branes in five-dimensional anti de Sitter space. We find that for a realistic bounce the back reaction from the generated gravitons will be most likely relevant. This letter summarizes the main results and conclusions from numerical simulations which are presented in detail in a long paper [M.Ruser and R. Durrer, Phys. Rev. D 76, 104014 (2007), arXiv:0704.0790]

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑