Kvantseaduspärasuse

Kvantseaduspärasuse, commonly translated as quantum entanglement, is a physical phenomenon that occurs when a group of particles are generated, interact, or share spatial proximity in such a way that the quantum state of each particle cannot be described independently of the state of the others, even when the particles are separated by a large distance. Instead, a quantum state must be described for the system as a whole.

When particles are entangled, they are intrinsically linked. If you measure a property of one particle, such as its spin or polarization, you instantaneously know the corresponding property of the other entangled particle, regardless of the distance separating them. This correlation is not due to any hidden classical information or pre-existing states, but rather a fundamental aspect of quantum mechanics.

Albert Einstein famously referred to this phenomenon as "spooky action at a distance" because it appeared to violate the principle that information cannot travel faster than the speed of light. However, numerous experiments have confirmed the reality of quantum entanglement. While it doesn't allow for faster-than-light communication, it has profound implications for our understanding of reality and is a crucial resource for emerging quantum technologies.

Entanglement is a cornerstone of quantum computing, quantum cryptography, and quantum teleportation. In quantum computing, entangled qubits can perform computations that are intractable for classical computers. In quantum cryptography, entanglement can be used to create secure communication channels. Quantum teleportation uses entanglement to transfer the quantum state of a particle from one location to another without physically moving the particle itself. The study and application of kvantseaduspärasuse continue to be active areas of research in physics.