One Thing Is Certain: Heisenberg’s Uncertainty Principle Is Not Dead: Scientific American.
Experimenters violate Heisenberg’s original version of the famous maxim, but confirm a newer, clearer formulation
In 2003 Masanao Ozawa of Nagoya University developed a new formulation of the error–disturbance uncertainty that Heisenberg aimed to express, but this time on much firmer footing. Derived mathematically from quantum measurement theory, the new formulation describes error and disturbance as well as fluctuations: ε(q)η(p) + σ(q)η(p) + σ(p)ε(q) ≥ h/4π.
