Photon Entanglement

Photon entanglement is a quantum phenomenon where two or more photons become interconnected such that the state of one instantly influences the state of the other, regardless of distance. When entangled, measuring a property (like polarization) of one photon immediately reveals the corresponding property of its partner. This correlation persists even if the photons are separated by vast distances, suggesting a deep connection rooted in their shared quantum state. Entanglement challenges classical ideas of separability and locality, and it is fundamental to emerging technologies like quantum computing and secure communication.