A Treatise on the Magnetic Vector Potential

The connection between the electric and magnetic fields is fundamental to our understanding of light as electromagnetic waves. The magnetic vector potential lies at the heart of this relation. The idea emerged in the early days of research in electromagne

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A Treatise on the Magnetic Vector Potential

A Treatise on the Magnetic Vector Potential

Kristján Óttar Klausen

A Treatise on the Magnetic Vector Potential

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Kristján Óttar Klausen Reykjavík University Reykjavik, Iceland

ISBN 978-3-030-52221-6 ISBN 978-3-030-52222-3 https://doi.org/10.1007/978-3-030-52222-3

(eBook)

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To the essence of both student and teacher; the spark of curiosity igniting the wonderful guiding force of inspiration.

Foreword by Viðar Guðmundsson

At the University of Iceland, where I have taught various physics courses, the physics students first encounter the electromagnetic vector potential in the second year. This first encounter is rather superficial, but hopefully the best students realize that the potentials at least offer a convenient method to derive the electric and the magnetic fields in many different situations. As Green functions are not introduced at the same time I am not sure if the majority of students really understands this, and a real understanding of the gauge freedom is far away. Luckily, there are sometimes students, who question the role of the potentials and want to learn more about them. Most often this is coupled to their interest in quantum mechanics. Kristján Klausen is the only student I have had in my class who, very soon after the introduction of the vector potential, came to my office with questions if I knew about systems that could lead to a vector potential with certain properties I had not thought of before. I must admit that initially I was not sure why he was asking these questions. I even wondered if some of the questions came from non-scientific l