EPR Paper

The Einstein-Podolsky-Rosen (EPR) paper, published in 1935, challenged the completeness of quantum mechanics. It introduced a thought experiment showing that particles can become entangled, meaning their properties are linked regardless of distance. EPR argued this suggested that quantum mechanics might not provide a full description of reality, implying the existence of "hidden variables" that deterministically govern outcomes. The paper sparked decades of debate about the nature of reality, locality, and whether quantum theory is complete. Modern experiments testing entanglement have largely confirmed quantum predictions, shaping our understanding of the fundamental interconnectedness of particles.