Are Events Absolute?

TL;DR

This paper examines the Wigner's Friend thought experiment, discussing its implications for the nature of reality and the absoluteness of events in quantum mechanics, highlighting recent theoretical developments that challenge classical notions of absolute events.

Contribution

It provides a comprehensive overview of Wigner's Friend experiment and analyzes recent extensions that question the absoluteness of events in quantum theory.

Findings

Recent versions suggest events may not be absolute.

The experiment challenges classical notions of objective reality.

It explores the role of consciousness in quantum measurement.

Abstract

The Wigner's Friend thought experiment stands as one of the most intellectually provocative and challenging conceptual puzzles in quantum mechanics. It compels us to confront profound questions concerning the fundamental nature of reality, the very act of observation, and the possible role that consciousness might play within the quantum measurement process. This article gives a general presentation, beginning with Eugene Wigner's seminal proposal of the original thought experiment. In this paper, we explore its initial implications, which shook the foundations of classical physics, and then progress to an examination of the recent theoretical advancements and the ingenious extended versions of the experiment. The recent versions seem to imply that it is no more possible to consider events as absolute.