Heisenberg uncertainty principle

To the chagrin of many physicists, the Heisenberg uncertainty principle determines that one cannot simultaneously know a signal's position and momentum, or voltage and current, with accuracy.

Since a bolometer measures power, or photon number, it is not bound to add quantum noise stemming from the Heisenberg uncertainty principle in the way that parametric amplifiers are.

Others exploit the trade-offs implicit in the famous Heisenberg uncertainty principle.

The Heisenberg uncertainty principle states that if you simultaneously measure the position and momentum of an electron, the product of the uncertainties in those measurements must exceed a “standard quantum limit.”

Because we have some information about the particles’ position, the Heisenberg uncertainty principle implies that we must have some uncertainty about the particles’ velocity—their energy.