It is argued that quantum states of geometry, like those of particles, should be coherent on light cones of any size. An exact classical solution, the gravitational shock wave of a relativistic point particle, is used to estimate gravitational drag from coherent energy flows, and the expected gravitational effect of virtual transverse vacuum energy fluctuations on surfaces of causal diamonds. It is proposed that the appropriately spacetime-averaged gravitational effect of the Standard Model vacuum state leads to the observed small nonzero value of the cosmological constant, dominated by gravitational drag of virtual gluonic strings at the strong interaction scale.

中文翻译：

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相干量子引力中的宇宙常数

有人认为，几何的量子态，就像粒子的量子态一样，应该在任何大小的光锥上都是相干的。一个精确的经典解，相对论点粒子的引力冲击波，用于估计相干能量流的引力阻力，以及虚拟横向真空能量波动对因果钻石表面的预期引力效应。有人提出，标准模型真空状态的适当时空平均引力效应导致观察到的宇宙学常数很小的非零值，主要是强相互作用尺度下虚拟胶子弦的引力拖曳。