标题： 寻找量子引力 显示英文标题

标题： Search for Quantum Gravity

摘要： 量子引力的满意理论可能需要对我们对时空的感知进行剧烈修改，使其在与普朗克长度相当的距离上具有泡沫结构。 本文认为，在可预见的未来，实验检测这种结构可能是一个现实的可能性。 在简要回顾了不同的量子引力理论方法及其相互关系之后，我们讨论了各种可能的时空量子性质的实验测试。 如果这些效应仅受到最小的抑制，来自遥远天体物理源（如伽马射线暴）的光子观测以及中性K介子衰变的实验室实验可能会对量子引力效应敏感。 来自Whipple天文台和CPLEAR合作组的实验限制已经接近普朗克尺度，显著提高灵敏度是可行的。 显示英文摘要

摘要： A satisfactory theory of quantum gravity may necessitate a drastic modification of our perception of space-time, by giving it a foamy structure at distances comparable to the Planck length. It is argued in this essay that the experimental detection of such structures may be a realistic possibility in the foreseeable future. After a brief review of different theoretical approaches to quantum gravity and the relationships between them, we discuss various possible experimental tests of the quantum nature of space-time. Observations of photons from distant astrophysical sources such as Gamma-Ray Bursters and laboratory experiments on neutral kaon decays may be sensitive to quantum-gravitational effects if they are only minimally suppressed. Experimental limits from the Whipple Observatory and the CPLEAR Collaboration are already probing close to the Planck scale, and significant increases in sensitivity are feasible.