Garrett Lisi is a theoretical physicist known for his work on the "Exceptionally Simple Theory of Everything," which proposes that the E8 Lie group can describe the fundamental forces and particles in the universe. Lisi is also an avid surfer and has gained attention for his unconventional approach to physics outside of academia.
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LINKED MENTIONED:
• Garrett Lisi’s TED talk on his theory of everything: https://www.youtube.com/watch?v=y-Gk_Ddhr0M
• Garrett Lisi’s website: https://li.si/
• Garrett Lisi’s papers: https://li.si/Physics/CV.html
• Peter Woit on TOE: https://www.youtube.com/watch?v=9z3JYb_g2Qs
• Garrett Lisi’s paper on triality: https://arxiv.org/pdf/2407.02497
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TIMESTAMPS:
00:00 - Intro
01:24 - Garrett’s Ted Talk and Background
08:36 - Mystery of Spinors
10:13 - Garrett Poses a Physical Problem
12:22 - String Theorists
23:48 - Triality
26:13 - Garrett’s Top Points in His Talk
28:42 - “String Theory’s the Only Game in Town”
32:10 - Garrett’s Presentation Begins: Unification
38:22 - Spinors vs. Fermions
45:56 - More Particles in Higher Gauge Groups
48:42 - Threefold Symmetry
54:00- Group Theory Overview
59:37 - Quaternion Group
01:04:14 - Pin Group
01:10:25 - Spin Eigenvalues
01:14:45 - C, P, and T
01:22:12 - Biquaternionic Spinors
01:25:55 - Quaternion Triality and the CPTt Group
01:34:14 - Multi-Generational Fermion States
01:37:20 - Fermions in Exceptional Unification
01:42:12 - Exceptional Magic Square
01:44:22 - Outro / Support TOE
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