Variational Principle in quantum field theory

Variational Principle in quantum field theory

We give three examples:

Variational Principle of Schrodinger equation 0:00
Variational Principle of Dirac equation
Variational Principle of Maxwell equation

Theoretical Physics:

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Quantum Mechanics:

https://www.youtube.com/playlist?list=PLg9w7tItBlZuP5Wv2jMbeTd7uc9ZXYS6m

Quantum Field Theory:
https://www.youtube.com/playlist?list=PLg9w7tItBlZvvsWqUz6uR85ktsrcv5Y4r

Electrodynamics:

https://www.youtube.com/playlist?list=PLg9w7tItBlZu6oIdAtRaT-Wtjkg3_dJcQ

Quantum Information:

https://www.youtube.com/playlist?list=PLg9w7tItBlZs2JgNL6qxtlnWAFkqoJG

Quantum Algorithms:

https://www.youtube.com/playlist?list=PLg9w7tItBlZvyCUpJAskKqpeLkKhrtQio