论文标题
量子因果关系以及时间和热力学的箭头
Quantum causality and the arrows of time and thermodynamics
论文作者
论文摘要
在理解基本互动时，时间的起源被认为是有问题的。但是，量子场理论具有因果关系，它告诉我们哪个时间方向是过去的灯节，哪个是未来。这个方向与量化程序中使用的约定有关。不同可能的因果方向具有相关的物理学 - 从这个意义上讲，它们在时间反转下是协变量的。但是，对于一组惯例，只有一个因果方向出现。该因果箭告诉我们散射反应继续进行的方向。散射的时间方向依次告诉我们熵增加的时间方向 - 所谓的热力学箭头。在大多数关于时间箭头的讨论中，这种连接被忽略了。
In the understanding of the fundamental interactions, the origin of an arrow of time is viewed as problematic. However, quantum field theory has an arrow of causality, which tells us which time direction is the past lightcone and which is the future. This direction is tied to the conventions used in the quantization procedures. The different possible causal directions have related physics - in this sense they are covariant under time-reversal. However, only one causal direction emerges for a given set of conventions. This causal arrow tells us the direction that scattering reactions proceed. The time direction of scattering in turn tells us the time direction for which entropy increases - the so-called arrow of thermodynamics. This connection is overlooked in most discussions of the arrow of time.
