In theoretical physics, both Quantum Mechanics and Quantum Field Theory (QFT) are essential for describing the quantum world, particularly in the context of metals. Quantum Mechanics is often sufficient for basic descriptions, while Quantum Field Theory provides a more detailed and powerful framework. Typically, one starts with Quantum Mechanics and transitions to Quantum Field Theory for complex scenarios requiring greater precision.
PREREQUISITESThe discussion is beneficial for theoretical physicists, students of physics, and anyone interested in the foundational concepts of Quantum Mechanics and Quantum Field Theory.
Thanks for such great awnser!A. Neumaier said:If you want to have enough detail, you need quantum field theory, but in many cases, quantum mechanics is sufficient. Metals can be described in both ways. Usually one begins with the particle description (quantum mechanics) and then switches to the field description (quantum field theory) as it is more powerful.