假象与微观因果性:光锥、引力波与哈勃常数
Fakeons and microcausality: light cones, gravitational waves and the Hubble constant
摘要:
假粒子或“假子”的概念,通过在非常小的距离上放弃因果关系,使我们能够理解作为紫外线完备理论的量子引力。我们调查违反微观因果关系是否可以放大或检测到在最常见的设置。我们表明,它实际上是短范围的所有实际目的。由于我们实验的限制,违反不沿光锥或通过引力波传播。在某些情况下,宇宙甚至合谋使这种效应消失。例如,哈勃常数的正性似乎决定了早期宇宙的时间方向。
英文摘要:
The concept of fake particle, or "fakeon", allows us to make sense of quantum gravity as an ultraviolet complete theory, by renouncing causality at very small distances. We investigate whether the violation of microcausality can be amplified or detected in the most common settings. We show that it is actually short range for all practical purposes. Due to our experimental limitations, the violation does not propagate along the light cones or by means of gravitational waves. In some cases, the universe even conspires to make the effect disappear. For example, the positivity of the Hubble constant appears to be responsible for the direction of time in the early universe.
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