What is decoherence?

Question: What is decoherence in quantum computing? A) The loss of quantum information due to interaction with the environment B) The process of adding more classical bits C) A method for perfectly copying qubits D) A type of sorting algorithm Correct: A Explanation: Decoherence occurs when a quantum system interacts with its environment and loses quantum properties such as superposition or phase coherence. It is a major challenge for real quantum hardware. Topic: quantum computing / decoherence / noise