quantum limit

Etymology
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.

Noun

 * 1)  The limit on measurement accuracy at quantum scales due to back-action effects.
 * 2)  The shortest wavelength in an X-ray spectrum.
 * 1)  The shortest wavelength in an X-ray spectrum.

Derived terms

 * (SQL)