Quantum States of Fields for Quantum Split Sources

TL;DR

This paper presents a quantum field theoretical framework for describing field-mediated entanglement experiments, explicitly illustrating superpositions of macroscopically distinct field configurations and geometries in electromagnetism and linearized quantum gravity.

Contribution

It introduces a transparent formulation of quantum fields that explicitly displays superpositions of macroscopically distinct states, advancing understanding of quantum superpositions in gravity and electromagnetism.

Findings

Explicit quantum superpositions of field states demonstrated

Framework applies to electromagnetism and linearized quantum gravity

Enhances understanding of macroscopic quantum superpositions in fields

Abstract

Field mediated entanglement experiments probe the quantum superposition of macroscopically distinct field configurations. We show that this phenomenon can be described by using a transparent quantum field theoretical formulation of electromagnetism and gravity in the field basis. The strength of such a description is that it explicitly displays the superposition of macroscopically distinct states of the field. In the case of (linearised) quantum general relativity, this formulation exhibits the quantum superposition of geometries giving rise to the effect.