Quantum Measurement Incompatibility: A Unified Framework For Diverse Notions.

Quantum Measurement Incompatibility: A Unified Framework For Diverse Notions.

Recent research clarifies that varying definitions of measurement incompatibility, a fundamental concept in quantum mechanics relating to the limits of simultaneously measurable properties, represent distinct ways of quantifying the informational content within a measurement device, establishing a hierarchical relationship between these notions and impacting interpretations of related quantum information protocols.

Quantum state of electrons measured for the first time ever

The photoelectric effect, first explained in 1905, transformed our understanding of how light interacts with matter. When high-energy light hits atoms, it knocks electrons loose. This process powers tools like holography, spectroscopy, and electron microscopes. But despite its importance, the full quantum behavior of those freed electrons has stayed out of reach—until recently. Researchers at Lund University in Sweden have changed that. For the …