Potentials were originally developed as mathematical tools to simplify complex physics problems (like the three-body problem), but the Aharonov-Bohm effect suggests they may be more fundamental to reality than the fields themselves.

Potentials were originally developed as mathematical tools to simplify complex physics problems (like the three-body problem), but the Aharonov-Bohm effect suggests they may be more fundamental to reality than the fields themselves.

The 1986 Tonomura experiment using a toroidal magnet coated in superconducting niobium provided definitive experimental proof of the effect, showing a phase shift in electron interference patterns.

Physicists remain divided on interpretation: some believe potentials are physically real and more fundamental than fields, while others maintain fields are real but can act non-locally across space.

The effect has been extended to gravity, with 2022 Stanford experiments suggesting a gravitational Aharonov-Bohm effect exists, potentially revealing fundamental truths about how the universe works at quantum scales.

The effect has been extended to gravity, with 2022 Stanford experiments suggesting a gravitational Aharonov-Bohm effect exists, potentially revealing fundamental truths about how the universe works at quantum scales.

We still don't understand magnetism

Name: We still don't understand magnetism
Uploaded: 2026-02-04T19:52:58.323363
Duration: 35 min 44 s
Description: This Veritasium video explores the Aharonov-Bohm effect, a groundbreaking quantum mechanics experiment from the 1950s that challenged the fundamental understanding of electromagnetic fields and potentials. The video demonstrates how electrons can be influenced by electromagnetic potentials even in r

By Veritasium

Watch on YouTube (35:44)

Overview

This Veritasium video explores the Aharonov-Bohm effect, a groundbreaking quantum mechanics experiment from the 1950s that challenged the fundamental understanding of electromagnetic fields and potentials. The video demonstrates how electrons can be influenced by electromagnetic potentials even in regions where electric and magnetic fields are completely zero, forcing physicists to reconsider whether potentials are merely mathematical tools or fundamental aspects of reality.

Key Takeaways

The Aharonov-Bohm effect demonstrates that electrons can be influenced by electromagnetic potentials even in regions where electric and magnetic fields are exactly zero, challenging 200 years of physics understanding.
Potentials were originally developed as mathematical tools to simplify complex physics problems (like the three-body problem), but the Aharonov-Bohm effect suggests they may be more fundamental to reality than the fields themselves.
The 1986 Tonomura experiment using a toroidal magnet coated in superconducting niobium provided definitive experimental proof of the effect, showing a phase shift in electron interference patterns.
Physicists remain divided on interpretation: some believe potentials are physically real and more fundamental than fields, while others maintain fields are real but can act non-locally across space.
The effect has been extended to gravity, with 2022 Stanford experiments suggesting a gravitational Aharonov-Bohm effect exists, potentially revealing fundamental truths about how the universe works at quantum scales.