高维度沟通与S.E.T. I
Higher-Dimensional Communication and S.E.T.I
摘要：
在四维以上的宇宙学中，统一所需的类型，信号有可能具有超过光速的速度。使用五维模型，否则同意的意见，两个主题进行审查：（一）场方程的精确解，描述了一个大的宇宙学常数和波在普通的三维空间中的速度超过光速的4D时空。(b)一个例子，其中4D间隔或适当的时间由与第五维相关联的标量场的系统变化调制，提供了一种简单的信令方法。这些以及高维宇宙学的相关结果对天体物理学有着重要的意义，特别是对地外文明的搜寻。
英文摘要：
In cosmologies with more than four dimensions, of the type required for unification, it is possible for signals to have velocities in excess of that of light. Using a five-dimensional model which otherwise agrees with observations, two subjects are reviewed: (a) An exact solution of the field equations which describes a 4D spacetime with a large cosmological constant and waves travelling in ordinary 3D space with velocities exceeding lightspeed. (b) An example where the 4D interval or proper time is modulated by the systematic variation of the scalar field associated with the fifth dimension, providing a simple signalling method. These and related consequences of higher-dimensional cosmology have significant implications for astrophysics, and especially the Search for Extraterrestrial Intelligence.
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