Quantum Jump Quantum Leap n(ca. 1926)
1. an abrupt transition (as of an electron, an atom or molecule) from one discrete energy state to another
2. an abrupt change, sudden increase, or dramatic advance called also quantum leap
Quantum Theory n(1911)
a theory in physics based on the concept of subdivision of radiant energy in finite quanta and applied to numerous
processes involving transference or transformation of energy in an atomic or molecular scale
Websters Ninth New Collegiate Dictionary