Phys.org  November 4, 2024 Attosecond physics enables the study of ultrafast coherent electron dynamics in matter upon photoexcitation and photoionization where there has been a strong focus on probing the physical manifestations of internal quantum coherence within the individual parent ion and photoelectron systems. An international team of researchers (UK, Germany) designed theoretically and modelled numerically a direct probe of quantum entanglement in attosecond photoionization in the form of a Bell test and paved the way for the direct observation of entanglement in the context of ultrafast photoionization of many-electron systems. According to the researchers their work provides a novel […]