(plural quantum limits)
- (physics) The limit on measurement accuracy at quantum scales due to back-action effects.
- (spectroscopy) The shortest wavelength in an X-ray spectrum.
The spectroscopic sense is first attested in the 1920s; the measurement sense was coined by Vladimir Braginsky in a 1967 paper, and was originally restricted to the study of gravitational waves.
- attributive form of quantum limit, noun.