Quantum leap or variation, may refer to:

In general

Quantum leap (physics), also known as quantum jump, a transition between quantum states

Atomic electron transition, a key example of the physics phenomenon

Paradigm shift, a sudden change of thinking, especially in a scientific discipline

Tipping point (sociology), a sudden and drastic change of behavior by group members in a social environment

Arts and entertainment

Quantum Leap (1989 TV series), a 1989–1993 American television series

Quantum Leap (2022 TV series), a revival of the 1989 series

The Quantum Leap, a public art sculpture in Shrewsbury, England

Quantum Leap, a 2021 album by Gus G

Emergency: Quantum Leap, a 2019 EP by X1

"Quantum Leap" (The Upper Hand), a 1995 television episode

Other uses

Sinclair Quantum Leap or QL, a personal computer from Sinclair

Quantum Leap Technology, a (defunct) U.S. fuel cell company