Decoherence in Sub-Systems of an Isolated System and the Disappearance of Quantum Multiverse

TL;DR

This paper investigates how decoherence causes classical behavior in a three-particle quantum system without external environments, suggesting the universe's wavefunction may also collapse spontaneously.

Contribution

It introduces a three-particle model demonstrating spontaneous wavefunction collapse and non-simultaneous decoherence decisions without external influence.

Findings

Decoherence decisions are not simultaneous among particles.

Wavefunction collapse occurs spontaneously without external environments.

Implications for the universe's wavefunction collapse mechanism.

Abstract

This study was started to know mysterious classicality of nuclei. Using three particles model without external environments, it is found that decisions of respective state of three particles by decoherence are not simultaneous. Furthermore, in this model, wave function of total three body system collapses spontaneously without any external environments. Therefore we may able to insist that a wavefunction of our universe has already collapsed spontaneously without any external observer, because of the same mechanism with this model.