Entanglement is a phenomenon in quantum mechanics where two or more particles become connected in such a way that the state of one particle cannot be described without considering the state of the other particle(s). This is in contrast to separable state, where the state of each particle can be described independently of the others.
Entanglement occurs when two or more particles interact and become correlated. This can happen through processes such as particle creation/annihilation, collisions, or measurements.
Entanglement has many potential applications in quantum computing, cryptography, and communication. It can also be used to study fundamental aspects of quantum mechanics and to test the limits of our current understanding of the universe.
Yes, entanglement can be created artificially in a controlled laboratory setting. This is typically done using quantum devices such as photon sources, superconducting circuits, or ion traps.
Entanglement can be measured using various techniques, such as entanglement witnesses, quantum state tomography, or Bell inequality tests. These methods allow us to determine the amount of entanglement present in a system and verify its existence.