# Does the quantum mechanical wave function exist?

## TL;DR

This paper argues that the quantum wave function is a real, ontic entity, based on analysis of quantum formalism, superposition, measurement, decoherence, and quantum gravity.

## Contribution

It provides a comprehensive argument supporting the ontic reality of the quantum wave function, integrating insights from quantum formalism and gravity.

## Key findings

- The wave function is a real feature of Nature.
- Superposition principle is central to quantum reality.
- Quantum gravity influences support the ontic view.

## Abstract

I address the question whether the wave function in quantum theory exists as a real (ontic) quantity or not. For this purpose, I discuss the essentials of the quantum formalism and emphasize the central role of the superposition principle. I then explain the measurement problem and discuss the process of decoherence. Finally, I address the special features that the quantization of gravity brings into the game. From all of this I conclude that the wave function really exists, that is, it is a real (ontic) feature of Nature.