Error-Disturbance Trade-off in Sequential Quantum Measurements

Phys Rev Lett. 2019 Mar 8;122(9):090404. doi: 10.1103/PhysRevLett.122.090404.

Abstract

We derive a state-dependent error-disturbance trade-off based on a statistical distance in the sequential measurements of a pair of noncommutative observables and experimentally verify the relation with a photonic qubit system. We anticipate that this Letter may further stimulate the study on the quantum uncertainty principle and related applications in quantum measurements.