What is quantum entanglement?

Question: What does it mean when two qubits are entangled? A) Each qubit can be described independently B) Their joint state has correlations that cannot be fully described separately C) They must always have the same physical location D) They are classical bits stored in quantum memory Correct: B Explanation: Entangled qubits share a joint quantum state. The state of the full system cannot always be broken into separate independent states for each qubit. This is one of the key differences between quantum and classical systems. Topic: quantum computing / entanglement