在PETRA进行普朗克尺度重力试验-意向书
Planck-scale gravity test at PETRA -- Letter of Intent
摘要：
量子或扭转引力模型预言了在非常短的距离上时空的不寻常性质。特别是，在普朗克长度附近，在$10^{-35}m$附近，空的空间可以表现为晶体，单折射或双折射。然而，这一假设仍然无法通过任何直接测量来验证，因为在实验中可达到的最小距离大约是LHC上的$10^{-19}m$。在这里，我们提出了一个实验室测试来测量空间双折射或引力引起的双折射活动。用PETRA 6 GeV光束探测紫外激光康普顿散射，可获得双折射真空的$10^{-31}m$和单折射真空的$10^{-28}m$灵敏度。
英文摘要：
Quantum or torsion gravity models predict unusual properties of space-time at very short distances. In particular, near the Planck length, around $10^{-35}m$, empty space may behave as a crystal, singly or doubly refractive. This hypothesis, however, remains uncheckable for any direct measurement since the smallest distance accessible in experiment is about $10^{-19}m$ at the LHC. Here we propose a laboratory test to measure space birefringence or refractivity induced by gravity. A sensitivity $10^{-31}m$ for doubly and $10^{-28}m$ for singly refractive vacuum could be reached with PETRA 6 GeV beam exploring UV laser Compton scattering.
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