The reason why the physics department put quantum mechanics last is because the previous courses are all preparatory courses of quantum mechanics. Mathematics: calculus, linear algebra, probability theory (just known), mathematical equations (very important). As I said before, if you know a little about complex function, I want to ask you, how can you learn mathematical and physical equations without learning complex function? Physics: general physics (which can be understood), theoretical mechanics is mainly the part of analytical mechanics, electrodynamics is more or less a bit, mainly learning some calculation methods, and the statistical physics part of thermodynamic system, atomic physics is the best, so it doesn't matter if you don't look at it. If you recommend a textbook, it is enough to take Tongji's high-number line generation set. If you like, you'd better take a calculus course or Jimidovich, but it's not necessary. If you are a physics textbook, you can check the mainstream domestic textbooks online. Quantum Mechanics recommends Griffith's Introduction to Quantum Mechanics, which can be used as an exercise book. Qian Bochu, Zhou Shixun and Su Rukeng have spare capacity to read, and there is also a French book on quantum mechanics. Summary of learning experience of quantum mechanics: I divide quantum mechanics into six parts: Schrodinger equation and wave function, potential well bound state and barrier scattering state, self-adjoint operator and mechanical quantity, orbital and spin angular momentum, hydrogen atom and atomic spectrum, perturbation theory. The necessary preparatory knowledge required for each part is as follows (it is not needed in brackets, but it can make understanding more convenient): Schrodinger equation: wave optics, potential field of ordinary differential equation: constant. (Mathematical Method) Operator: Angular Momentum of Linear Algebra: Hydrogen Atom of Linear Algebra: Mathematical Method, Perturbation Theory of (High School Chemistry): Higher Mathematics seems to focus on mathematics. Classical physics is of little help to quantum mechanics. Modern physics society is more helpful. Many schools study modern physics first and then quantum mechanics.