quantum leap
— Noun
– English
～ a sudden large increase or advance; "this may not insure success but it will represent a quantum leap from last summer"
quantum
— Noun
– English
～ a discrete amount of something that is analogous to the quantities in quantum theory
quantum electrodynamics
— Noun
– English
～ a relativistic quantum theory of the electromagnetic interactions of photons and electrons and muons
quantum jump
— Noun
– English
～ (physics) an abrupt transition of an electron or atom or molecule from one quantum state to another with the emission or absorption of a quantum