[CapstanRoller]

A quantum leap is actually a tiny event e.g. an electron energy level transition

[minitoar]

You’re thinking of a quantum jump. https://www.merriam-webster.com/dictionary/quantum%20leap

[CapstanRoller]

They're synonyms, per your link. Also check out Wikipedia

>Quantum Jump

>Redirected from Quantum leap (physics))

https://en.wikipedia.org/wiki/Quantum_leap#In_general

[lmm]

Tiny in absolute terms, but huge relative to the things involved.