标题： 量子引力中轻锥涨落的微观反冲模型 显示英文标题

标题： A Microscopic Recoil Model for Light-Cone Fluctuations in Quantum Gravity

摘要： 我们提出一个微观模型，用于描述真空中的光锥涨落，该模型包含了能量粒子引起的量子引力反冲效应的处理。 将时空缺陷视为弦理论中的孤子，我们推导出一种与能量相关的折射率，以及由于通过时空泡沫的量子扩散导致的单能光子到达时间的随机扩散，这一结果之前已通过有效的Born-Infeld作用量得到。 遥远的天体物理源为这些可能的量子引力现象提供了敏感的测试。 显示英文摘要

摘要： We present a microscopic model for light-cone fluctuations ``in vacuo'', which incorporates a treatment of quantum-gravitational recoil effects induced by energetic particles. Treating defects in space-time as solitons in string theory, we derive an energy-dependent refractive index and a stochastic spread in the arrival times of mono-energetic photons due to quantum diffusion through space-time foam, as found previously using an effective Born-Infeld action. Distant astrophysical sources provide sensitive tests of these possible quantum-gravitational phenomena.