Are Quantum States Subjective?

TL;DR

This paper explores the subjective nature of quantum states, emphasizing that state assignment depends on the observer's knowledge and highlighting the inherent subjectivity in quantum collapse and belief.

Contribution

It argues that quantum state assignment is fundamentally subjective and that objective states are derived from the observer's subjective knowledge, analyzing the collapse postulate in detail.

Findings

Quantum states are inherently subjective, based on observer knowledge.

Objective state assignment follows from subjective states.

Collapse involves inherent subjectivity in quantum measurement.

Abstract

The subjective nature of the quantum states is brought out and it is argued that the objective state assignment is subsequent to the subjective state of the observer regarding his state of knowledge about the system. The collapse postulate is examined in detail to bring out the inherent subjectivity of the quantum state. The role of doubt and faith in quantum state assignment is examined.