The Interaction Picture | S-Operator | S-Matrix | Quantum Field Theory @DietterichLabs
The Interaction Picture | S-Operator | S-Matrix | Quantum Field Theory @DietterichLabs
Uploaded March 2019 | Updated September 2026, 1 hour ago
In this video, I show you how to construct the interaction picture, and derive from it the S-operator, and the S-matrix. This is a very important topic in quantum field theory.

My Quantum Field Theory Lecture Series:
youtube.com/playlist?list=PLSpklniGdSfSsk7BSZjONcfhRGKNa2uou

Superfluid Helium Resonance Experiment video:
youtu.be/unUNQNmuvUQ
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The Interaction Picture | S-Operator | S-Matrix | Quantum Field Theory

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