What Is a Field?

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There are two types of fields, I think is important to distinguish. One is a classical field and the other is a quantum field. What makes it quantum is that a field can vibrate. You can imagine a field actually undergoing some oscillatory undulation. If these vibrations in a quantum field could actually be quantized, meaning that they have discrete vibrations so they can, their vibrational pattern is like a musical note. So you probably learned that in quantum mechanics you have wave particle duality. The field now explains what really is going on with particles.

In this important guide to science and society, cosmologist Stephon Alexander argues that physics must embrace the excluded, listen to the unheard, and be unafraid of being wrong. Drawing on his experience as a Black physicist, he makes a powerful case, in his latest book, for diversifying our scientific communities.

Shermer and Alexander discuss: his journey from Trinidad to the Bronx to professor of physics • what it’s like being Black in a mostly White and Asian field of science • systemic racism and misogyny • how to be an outsider inside a science • how to tell the difference between revolutionary and worthless new ideas • how do laypeople understand whether something is good science or not? • the double-slit experiment • superposition • connections between quantum physics and Eastern mysticism • creativity • What banged the Big Bang? • Are we living in a matrix? • Deepak Chopra’s mind monism • consciousness and the universe.

Stephon Alexander is a professor of theoretical physics at Brown University, an established jazz musician, and an immigrant from Trinidad who grew up in the Bronx. He is the 2020 president of the National Society of Black Physicists and a founding faculty Director of Brown University’s Presidential Scholars program, which boosts underrepresented students. In addition to his academic achievements, he was the scientific consultant to Ava DuVernay for the feature film A Wrinkle in Time. His work has been featured by the New York Times, the Wall Street Journal, WIRED, and many other outlets. He has been a guest on Nova, the Brian Lehrer Show, and Neil deGrasse Tyson’s StarTalk, among much else. The author of Fear of a Black Universe and The Jazz of Physics, Alexander lives in Providence, Rhode Island.