What is an ansatz?

Question: What is an ansatz in variational quantum algorithms? A) A parameterized quantum circuit used to prepare candidate solution states B) A classical output bitstring only C) A physical refrigerator used for quantum processors D) A rule that prevents all measurements Correct: A Explanation: An ansatz is a chosen parameterized circuit structure. The parameters are adjusted by an optimizer to search for a useful quantum state. Topic: quantum computing / ansatz / variational algorithms