Brane-world motion in compact dimensions
Brane-world motion in compact dimensions
复制标题
紧凑尺寸下的膜世界运动
DOI：
10.1088/0264-9381/28/15/155013
复制
发表时间：
2011
影响因子：
3.5
通讯作者：
M. Parikh
中科院分区：
文献类型：
--
作者：
B. Greene;J. Levin;M. Parikh
额外维度的拓扑可以打破全局洛伦兹不变性，即使在平坦时空中也能选出全局首选框架。通过探测全局拓扑的实验，观察者可以确定她相对于首选框架的运动状态。如果我们生活在一个穿过具有紧凑额外维度的平坦空间的膜宇宙中，这种情况就会实现。我们确定了由于宇宙运动而产生的三种实验效应，人们可以使用引力探测器探测到这些效应。其中之一与多重连通时空中孪生佯谬的特殊性质有关。另一个依赖于任何体场的卡鲁扎-克莱因模式对边界条件敏感的事实。第三个涉及运动膜上牛顿势的修改。值得注意的是，我们发现，如果膜移动得足够快，即使是很小的额外维度也可以被膜观察者检测到。通讯人：PR L V Moniz
The topology of extra dimensions can break global Lorentz invariance, singling out a globally preferred frame even in flat spacetime. Through experiments that probe global topology, an observer can determine her state of motion with respect to the preferred frame. This scenario is realized if we live on a brane universe moving through a flat space with compact extra dimensions. We identify three experimental effects due to the motion of our universe that one could potentially detect using gravitational probes. One of these relates to the peculiar properties of the twin paradox in multiply-connected spacetimes. Another relies on the fact that the Kaluza–Klein modes of any bulk field are sensitive to boundary conditions. A third concerns the modification to the Newtonian potential on a moving brane. Remarkably, we find that even small extra dimensions are detectable by brane observers if the brane is moving sufficiently fast. Communicated by P R L V Moniz