| Popis: |
Entanglement is a nonintuitive feature of quantum mechanics, leading to various nonlocal phenomena. For example, entangled states can display nonlocal correlations stronger than allowed by any local realistic theory, violating a Bell inequality, assuming various experimental loopholes are addressed. The Hardy paradox allows us to find a more familiar example of the difference between nonlocality and classical expectations. Here, we review the Hardy paradox and the “quantum cakes” example, and present a source of high-quality entangled photons with the best-to-date violation of this paradox. |
