Measuring the quantum state of photoelectrons
When light ejects electrons from atoms, understanding their full quantum nature goes beyond measuring momentum. Using quantum-state tomography, researchers reconstructed the complete quantum states of electrons emitted from helium and argon atoms by ultrashort extreme-ultraviolet light pulses. They found that helium produces a pure state, while argon’s spin–orbit interaction entangles the electron
https://www.nano.lu.se/article/measuring-quantum-state-photoelectrons - 2025-11-21
