The quasiclassical realms of this quantum universe
James B. Hartle (University of California, Santa Barbara)
TL;DR
This paper explains how classical predictability emerges from the quantum universe's state and dynamics, highlighting the transition from quantum indeterminism to classical determinism across various scales.
Contribution
It provides a detailed account of the emergence of classical realms within a quantum universe based on its state and dynamics.
Findings
Classical predictability arises in specific domains of the quantum universe.
Quantum theory can account for the classical laws observed in everyday life.
The emergence of classical realms explains the apparent determinism in a fundamentally indeterministic universe.
Abstract
The most striking observable feature of our indeterministic quantum universe is the wide range of time, place, and scale on which the deterministic laws of classical physics hold to an excellent approximation. This essay describes how this domain of classical predictability of every day experience emerges from a quantum theory of the universe's state and dynamics.
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