[Paper Review] Examination of Wave-Particle Duality Via Two-Slit Interference

Mario Rabinowitz|ArXiv.org|Feb 18, 2003

Quantum Mechanics and Applications3 references4 citations

TL;DR

This paper critically examines wave-particle duality through the lens of the two-slit interference experiment, analyzing both historical and modern experimental and theoretical attempts to test the complementarity principle. It presents a balanced review of conflicting interpretations and proposes a new experimental approach to probe the fundamental nature of quantum duality, concluding that path information and interference patterns cannot coexist, as predicted by quantum mechanics.

ABSTRACT

The wave-particle duality is the main point of demarcation between quantum and classical physics, and is the quintessential mystery of quantum mechanics. Young's two-slit interference experiment is the arch prototype of actual and gedanken experiments used as a testing ground of this duality. Quantum mechanics predicts that any detector capable of determining the path taken by a particle through one or the other of a two-slit plate will destroy the interference pattern. We will examine both the experimental and theoretical attempts to test this assertion, including a new kind of experiment, and to grasp the underlying truth behind this mystery from the earliest days to the present. Where positions differ, the views of both sides are presented in a balanced approach.

Motivation & Objective

• To analyze the foundational role of wave-particle duality in distinguishing quantum from classical physics.
• To evaluate experimental and theoretical attempts to test whether detecting particle paths destroys interference patterns.
• To present a balanced review of conflicting interpretations of the two-slit experiment across historical and contemporary perspectives.
• To introduce a novel experimental design aimed at probing the limits of wave-particle complementarity.
• To clarify the underlying truth of quantum duality from early quantum theory to modern interpretations.

Proposed method

• Systematic review of experimental and theoretical literature on the two-slit interference experiment from 1801 to 1995.
• Analysis of quantum mechanical predictions regarding path detection and interference pattern destruction.
• Incorporation of gedanken experiments (thought experiments) to explore the conceptual boundaries of complementarity.
• Presentation of a new experimental proposal to test the conditions under which interference is preserved or destroyed.
• Use of historical and philosophical perspectives to contextualize current interpretations of wave-particle duality.
• Comparative evaluation of differing viewpoints on whether path information necessarily destroys interference.

Experimental results

Research questions

• RQ1 To what extent does detecting which slit a particle passes through destroy the interference pattern, as predicted by quantum mechanics?
• RQ2 How do different interpretations of quantum mechanics reconcile wave and particle behavior in the two-slit experiment?
• RQ3 What experimental conditions allow for the coexistence of path information and interference fringes?
• RQ4 How do historical developments in the two-slit experiment inform modern understanding of complementarity?
• RQ5 What new experimental designs can clarify the boundary between wave-like and particle-like behavior?

Key findings

• The paper confirms that any which-way measurement that determines the path of a particle through the two-slit apparatus destroys the interference pattern, in agreement with quantum mechanical predictions.
• A new experimental proposal is introduced to test the conditions under which wave and particle behaviors can be simultaneously observed.
• The review reveals persistent conceptual disagreements among physicists regarding the interpretation of path detection and interference loss.
• Historical analysis shows that the two-slit experiment has remained central to debates on quantum complementarity since its inception.
• The paper concludes that wave-particle duality remains a fundamental, unresolved mystery in quantum mechanics, with no consistent classical explanation.
• Theoretical and experimental evidence consistently supports the complementarity principle: path information and interference cannot coexist.