Thank you!Orodruin said:Feynman diagrams are pictorial representations of terms in a perturbation series. A priori, you could use them to solve any system perturbatively as long as perturbation theory holds. As such you could a priori use them in standard quantum mechanics, but this is rarely done.
In practice, what you are looking for is likely how to use Feynman diagrams in quantum field theory. This requires more background than your introductory quantum mechanics textbook.
Feynman diagrams are a visual representation of mathematical equations that describe the interactions between particles in quantum field theory. They are used to better understand and predict the behavior of subatomic particles and their interactions.
While a basic understanding of physics is helpful, studying Feynman diagrams requires a deep understanding of quantum field theory, which is a complex topic. It is recommended to have a solid foundation in physics and mathematics before delving into the study of Feynman diagrams.
Shankar's approach to Feynman diagrams is based on a simplified version of quantum field theory, known as the "old-fashioned" approach. Beyond Shankar, there are more advanced techniques and concepts that are used to analyze and interpret Feynman diagrams, allowing for a deeper understanding of quantum field theory.
Yes, Feynman diagrams have many practical applications in the field of particle physics. They are used to calculate and predict the outcomes of particle interactions, and have played a crucial role in the development of the Standard Model, which is the most widely accepted theory of particle physics.
To improve your understanding of Feynman diagrams, it is important to have a strong foundation in quantum field theory, and to practice drawing and interpreting different types of diagrams. It can also be helpful to consult with experts in the field and attend lectures or workshops on the topic.