nonrelativistic quantum mechanics

nonrelativistic quantum mechanics

[¦nän‚rel·ə·tə′vis·tik ′kwän·təm mi′kan·iks] (quantum mechanics) The modern theory of matter and its interaction with radiation, applicable to systems of material particles which move slowly compared to the speed of light, which are neither created nor destroyed, and whose internal structure (except for spin) either does not change or is irrelevant to the description of the system.