EP 47 · 7:50

Spontaneous symmetry breaking

From America 250: The Breakthroughs That Built American Science — Part 2

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Physicist Yoichiro Nambu, working at the University of Chicago, introduced the concept of spontaneous symmetry breaking into quantum field theory in 1960. The idea describes how a system governed by symmetric underlying laws can settle into a state that is not itself symmetric, and it became foundational for later theoretical physics, including the Higgs mechanism that gives rise to the Higgs boson.

  1. 01

    The hosts describe the shape often used to visualize this symmetry breaking as a radially symmetric potential nicknamed the Mexican hat potential.

Transcript

140 words · auto-generated from the episode video

7:501960 discovery of spontaneous symmetry breaking. Yes, this was theoretical physicist Yoiro Nambu. He introduced the concept of spontaneous symmetry breaking in quantum field theory at the University of Chicago. Um basically this is the foundation for a lot of subsequent work that was done in quantum field theory. For example, the Higs mechanism >> that gives us the Higs Bzon and things like that that uses symmetry breaking in the same way that Yoshiro Nambu was talking about. And for all of those who are um theoretical physicists in the audience, you will recognize the Mexican hat potential on the right hand side.

8:31That is literally what we call it. I mean, it's a radially symmetric potential that looks like a Mexican hat. And that is the same type of mechanism that gives you know things like the W

From the episode
  1. EP 47

    America 250: The Breakthroughs That Built American Science — Part 2

    Part two of our America 250 special traces American science from Sputnik to the AI age, covering Apollo, ARPANET, CRISPR, LIGO, mRNA vaccines, JWST, transformers, and the future of science funding.

    America 250: The Breakthroughs That Built American Science — Part 2

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