Wavefunction reality, indeterminate properties and degrees of presence

TL;DR

This paper explores the concept of 'degree of presence' in quantum systems, linking wavefunction reality with indeterminate properties, and offers philosophical insights and historical context on quantum probabilities.

Contribution

It introduces and studies the 'degree of presence' concept, extending the idea of wavefunction reality and providing a philosophical and historical analysis of quantum indeterminacy.

Findings

Introduces the 'degree of presence' as a generalization of wave-like delocalization.

Provides a philosophical review of interpretations of quantum indeterminacy.

Connects the concept to the wavefunction-reality postulate.

Abstract

The degree-of-presence (of the quantum system) concept, accompanying that of the wavefunction-reality postulate, is introduced and studied in two ways. To begin with, an incomplete exposition of the present author's views is given. Subsequently, a short historical and philosophical review of answers to the question about the meaning of indeterminate individual-system probabilities is presented from the literature. It is done in the form of a carefully selected collage of quotations mostly with polemic comments by the present author and with further elaboration of his point of view. The advocated notion of 'degree of presence' generalizes the intuitively most easily acceptable idea of 'delocalization' in (roughly called)wavelike behavior of a quantum system.