2 articles
Free-electron–photon entanglement
Free-electron–photon entanglement is a quantum state in which a free electron and photons share correlations no classical description can reproduce, first demonstrated in April 2025 by researchers in Göttingen.
Monogamy of entanglement
Monogamy of entanglement, or entanglement monogamy, is a property of quantum entanglement stating it cannot be freely shared among many parties, quantified by the 2000 CKW inequality.