Uploaded January 2019 | Updated September 2026, 2 days ago

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In this video, I show you how to quantize a complex scalar field, in detail. I also discuss its meaning.

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

Superfluid Helium Resonance Experiment video:
youtu.be/unUNQNmuvUQ

Typo: when calculating the commutation relations for the creation and annihilation operators, it appears that I forgot the primes on the omega factors associated with the primed k integration variables. I didn't notice, because it doesn't end up mattering. In the case of the creation operator with the annihilation operator, a delta function that sets them equal shows up, and in the cases of like operators, the same thing happens, causing the shown cancellation.
As usual, I regret typos, but some are bound to happen in complicated material.