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原文連結
論文資訊
- 類型：已發表論文
- 日期：2020
摘要
A model 量子 cosmology is used to illustrate how arrows of time emerge in a universe governed by a time-neutral dynamical theory (H) constrained by time asymmetric initial and final boundary conditions represented by density matrices ρI and ρF . In a 量子 universe universe arrows of time are described by the probabilities of appropriately coarse grained sets of histories of quantities like 熵 that grow or decay. We show that the requirement of that these sets of histories decohere implies two things: (1) A time asymmetry between initial and final conditions that is a basis for arrows ot time. (2) How a final state of indifference that is represented by a density matrix ρF proportional to the unit density matrix is consistent with causality, and allows a finer-grained description of the model un
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