Quantum entanglement is a well-established phenomenon in quantum mechanics, supported by experimental evidence. It is not merely a theory but a fact of the quantum world. However, it is important to note that quantum entanglement does not allow for instantaneous transfer of information.
Quantum entanglement occurs when two or more particles become correlated in such a way that the state of one particle cannot be described independently of the other(s). This correlation persists even when the entangled particles are physically separated by large distances. The entangled particles are described by a joint quantum state, and measurements made on one particle can instantaneously affect the state of the other particle, regardless of the distance between them. This behavior has been confirmed through numerous experiments.
However, it is crucial to understand that quantum entanglement does not allow for faster-than-light communication or instantaneous transfer of information. The measurement outcomes of entangled particles are probabilistic, and while the measurement on one particle can instantly affect the other, it is not possible to transmit information or communicate in a meaningful way using this phenomenon. The correlation observed in entanglement is non-local, but it cannot be exploited for faster-than-light communication due to fundamental principles of quantum mechanics.
In summary, quantum entanglement is a well-established and experimentally confirmed phenomenon in quantum physics. However, it does not enable instantaneous communication or transfer of information, as it is limited by the principles of causality and the no-communication theorem in quantum mechanics.