The idea that entanglement allows for faster-than-light communication or computation is a common misconception. In reality, entanglement does not enable information transfer at speeds faster than the speed of light.
Entanglement is a fundamental concept in quantum mechanics where two or more particles become correlated in such a way that the state of one particle is linked to the state of the other(s), regardless of the distance between them. However, entanglement cannot be used to transmit information or signals instantaneously.
When two particles are entangled, measuring the state of one particle instantaneously affects the state of the other particle, even if they are far apart. However, this measurement outcome is random and unpredictable until the information is sent through conventional means (using classical communication channels) to the distant location where the other particle is located. This process of sending classical information to correlate measurement outcomes prevents any faster-than-light communication or computation.
In fact, quantum mechanics respects the fundamental principle of causality, which states that no information can be transmitted faster than the speed of light. This principle is supported by various experimental tests and is a cornerstone of our understanding of the universe.
While entanglement has important applications in quantum information processing and can enable certain types of secure communication (e.g., quantum key distribution), it does not violate the speed-of-light limit and does not provide a way to create computers that process data faster than light speed.