Quantum Field Theory - What Is a Particle?

Dive into the fundamental concept of particles in quantum field theory through this 37-minute video lecture. Begin with an exploration of Hooke's Law and simple harmonic motion, progressing to wave mathematics and quantum harmonic oscillators. Examine scalar and vector fields, relativistic fields, and zero-point energy. Discover how the combination of quantum mechanics and relativistic field theory leads to the definition of a particle as the smallest vibration of a quantum field. Draw insights from renowned sources in physics, including works by Anthony Zee, Matt Strassler, and Richard Feynman. Engage with complex topics such as the wave equation, quantum waves, and the nature of massless particles, culminating in a deeper understanding of the particle concept and its implications for our perception of reality.

Intro
Strategy
Hooke's Law
A bit of theory...
SHM Displacement Function
Time period and frequency
Energy of an oscillator
The birth of quantum physics
The quantum oscillator
Zero-point energy
Wave Motion
The wave equation
The modified wave equation
The energy of a wave
Quantum Waves
What is a field?
Relativistic Fields
Relativistic Quantum Fields
Massless Particles
So, what is a particle?
What is real?
Questions to answer