classical quantum theory
Physics term referring to early quantum theory before modern quantum mechanics; often contrasted with 現代量子論.
Classical quantum theory is based on the work of Planck and Bohr.
現代量子論 refers to modern quantum theory, while 古典量子論 refers to the earlier classical quantum theory.
Compound of 古典 (classical) + 量子 (quantum) + 論 (theory).