[Paper Review] Quantum mechanical retrocausation? Call for nonlocal causal models!

Antoine Suárez|ArXiv.org|Feb 12, 1998

Quantum Mechanics and Applications2 references3 citations

TL;DR

This paper proposes a nonlocal causal model as an alternative to quantum mechanical retrocausation, arguing that real experiments could distinguish between such models and retrocausal interpretations. It advocates for testing quantum mechanics against multiple nonlocal causal frameworks to resolve foundational questions in quantum foundations.

ABSTRACT

A new possible version of multisimultaneous causality is proposed, and real experiments allowing us to decide between this view and quantum mechanical retrocausation are further discussed. The interest of testing quantum mechanics against as many nonlocal causal models as possible is stressed.

Motivation & Objective

• To challenge the interpretation of quantum mechanics that invokes retrocausation as a fundamental mechanism.
• To propose a new version of multisimultaneous causality as a nonlocal causal alternative.
• To emphasize the importance of testing quantum mechanics against diverse nonlocal causal models.
• To stimulate experimental research capable of discriminating between retrocausal and nonlocal causal explanations.
• To advance foundational understanding by exploring causal models that preserve locality in a nonlocal framework.

Proposed method

• Proposes a novel formulation of multisimultaneous causality as a nonlocal causal model.
• Analyzes the implications of nonlocal causal models in the context of quantum entanglement and measurement outcomes.
• Uses thought experiments and theoretical analysis to contrast nonlocal causal models with retrocausal models.
• Stresses the need for experimental tests to differentiate between nonlocal causal models and retrocausal interpretations.
• Relies on conceptual and logical analysis of causal structures in quantum mechanics rather than mathematical formalism.
• Draws on existing quantum foundations literature to position the proposed model within broader interpretational debates.

Experimental results

Research questions

• RQ1 Can nonlocal causal models provide a viable alternative to quantum mechanical retrocausation?
• RQ2 What experimental setups could distinguish between nonlocal causal models and retrocausal models?
• RQ3 How does the proposed multisimultaneous causality model differ from standard local hidden variable theories?
• RQ4 What are the implications of nonlocal causality for the interpretation of quantum entanglement?
• RQ5 Why is it important to test quantum mechanics against a wide range of nonlocal causal models?

Key findings

• The paper introduces a new nonlocal causal model that avoids retrocausation while preserving consistency with quantum predictions.
• It argues that experimental tests could decisively rule out or support specific nonlocal causal models over retrocausal ones.
• The proposed model is framed as a generalization of causal structures in quantum mechanics, emphasizing nonlocality over backward-in-time causation.
• The paper highlights that multiple nonlocal causal models should be considered to avoid premature commitment to retrocausation.
• It concludes that the scientific value lies in testing quantum mechanics against a broad class of nonlocal causal models.
• The work does not claim to resolve the measurement problem but calls for a broader empirical and theoretical exploration of causal alternatives.