Feynman RulesLecture 2 on QFT by Hasan Mohammad

Introduction

Nobel Prize in Physics 1965

Lecture Content Interaction Picture Perturbation Theory Elementary Feynman Rules Calculating Amplitudes Example Exercises (1 & 2) Rates of Decay and lifetimes

Interaction Picture- S Matrix• Schrodinger• Interaction• Heisenberg.

Interaction Picture- S Matrix

• Schrodinger• Interaction• Heisenberg.

Interaction Picture- S Matrix

Interaction Picture-Hamiltonian

Interaction Picture-Hamiltonian

Perturbation Theory

Perturbation Theory

Calculating Amplitudes

Calculating Amplitudes

Calculating Amplitudes

Calculating Amplitudes

Calculating Amplitudes

Propagators

Example (1)

Propagators

Example (1)

Example (1)

Example (1) Amplitude

Probability

Example (2)

Example (2)

Example (2)

Example (2)

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