Kvanttientanglement

Kvanttientanglement, also known as quantum entanglement, is a fundamental phenomenon in quantum mechanics where pairs or groups of particles become interconnected in such a way that the state of one particle cannot be described independently of the state of the other(s), even when the particles are separated by large distances. This phenomenon was first described by Albert Einstein, Boris Podolsky, and Nathan Rosen in their 1935 paper, which introduced the EPR paradox, and later formalized by Erwin Schrödinger.

In an entangled state, the properties of the particles, such as spin or polarization, are correlated in a way that cannot be explained by classical physics. When one particle's property is measured, the state of the other particle is instantly determined, regardless of the distance between them. This instantaneous correlation is often referred to as "spooky action at a distance," a term coined by Einstein.

Entanglement is a crucial resource in quantum information science, enabling applications such as quantum teleportation, quantum key distribution, and quantum computing. It is also a key feature of quantum networks and quantum internet, where entangled particles can be used to transmit information securely and efficiently.

Despite its counterintuitive nature, entanglement has been experimentally verified numerous times using various systems, including photons, electrons, and atoms. The phenomenon remains an active area of research, with ongoing efforts to understand its fundamental nature and develop practical applications.