# How quantum mechanics with deterministic collapse localizes macroscopic objects

## TL;DR

This paper explains how a deterministic collapse model in quantum mechanics can rapidly localize macroscopic objects without decoherence, resolving the wave-particle duality discrepancy between microscopic and macroscopic scales.

## Contribution

It introduces a deterministic collapse mechanism that explains macroscopic localization without relying on decoherence, extending quantum theory to better account for classical behavior.

## Key findings

- Deterministic collapse causes rapid localization of macroscopic objects
- Localization occurs through object-object contact satisfying specific criteria
- Decoherence is not necessary for macroscopic localization

## Abstract

Why microscopic objects exhibit wave properties (are delocalized), but macroscopic do not (are localized)? Traditional quantum mechanics attributes wave properties to all objects. When complemented with a deterministic collapse model (Quantum Stud.: Math. Found. 3, 279 (2016)) quantum mechanics can dissolve the discrepancy. Collapse in this model means contraction and occurs when the object gets in touch with other objects and satisfies a certain criterion. One single collapse usually does not suffice for localization. But the object rapidly gets in touch with other objects in a short time, leading to rapid localization. Decoherence is not involved.