Chapter

The Fundamental Entities in String Theory
listen on Spotify
54:37 - 1:02:49 (08:11)

String theory proposes that the fundamental building blocks of the universe are not particles, but instead one-dimensional strings or loops which have different harmonics, each of which is a particle.

Clips
The puzzle of quantum gravity arises from the inconsistency between the particle description of quantum mechanics and the gravitational force in our universe.
54:37 - 56:59 (02:22)
listen on Spotify
Quantum Gravity
Summary

The puzzle of quantum gravity arises from the inconsistency between the particle description of quantum mechanics and the gravitational force in our universe. While quantum fields and photon particles work for electric forces, applying the same techniques to gravity fails to describe this fundamental force.

Chapter
The Fundamental Entities in String Theory
Episode
#204 – Cumrun Vafa: String Theory
Podcast
Lex Fridman Podcast
String theory proposes that fundamental entities are not particles but one-dimensional strings, each harmonic of which is considered a particle.
56:59 - 1:01:30 (04:30)
listen on Spotify
String Theory
Summary

String theory proposes that fundamental entities are not particles but one-dimensional strings, each harmonic of which is considered a particle. The size of these strings is thought to be around 10^-30 centimeters.

Chapter
The Fundamental Entities in String Theory
Episode
#204 – Cumrun Vafa: String Theory
Podcast
Lex Fridman Podcast
Veniziano wrote a mathematical formula to describe the symmetry seen in colliders, which physics found intriguing.
1:01:30 - 1:02:49 (01:19)
listen on Spotify
String theory
Summary

Veniziano wrote a mathematical formula to describe the symmetry seen in colliders, which physics found intriguing. A few years later, people discovered the equation had all the harmonics, leading to the invention of string theory.

Chapter
The Fundamental Entities in String Theory
Episode
#204 – Cumrun Vafa: String Theory
Podcast
Lex Fridman Podcast