A New Class of Retrocausal Models

TL;DR

This paper introduces a novel class of retrocausal classical field models that aim to explain quantum phenomena, including entanglement and weak values, without infinite energy issues, offering a new perspective on spacetime-based quantum explanations.

Contribution

It develops a new framework of globally-constrained classical fields that are retrocausal but non-signaling, providing solutions to key problems in classical explanations of quantum effects.

Findings

Models resolve issues with classical electromagnetic explanations of single-photon phenomena

Average field intensities relate to quantum weak values even at the single-photon level

Proposes a pathway for spacetime-based accounts of quantum entanglement and weak values

Abstract

Globally-constrained classical fields provide a unexplored framework for modeling quantum phenomena, including apparent particle-like behavior. By allowing controllable constraints on unknown past fields, these models are retrocausal but not retro-signaling, respecting the conventional block universe viewpoint of classical spacetime. Several example models are developed that resolve the most essential problems with using classical electromagnetic fields to explain single-photon phenomena. These models share some similarities with Stochastic Electrodynamics, but without the infinite background energy problem, and with a clear path to explaining entanglement phenomena. Intriguingly, the average intermediate field intensities share a surprising connection with quantum "weak values", even in the single-photon limit. This new class of models is hoped to guide further research into spacetime-based accounts of weak values, entanglement, and other quantum phenomena.