What is circuit depth?

Question: What does circuit depth represent? A) The number of physical chips in a quantum computer B) The number of sequential layers of operations in a circuit C) The number of classical programming languages used D) The size of the final measurement result only Correct: B Explanation: Circuit depth represents how many layers of operations must be performed sequentially. Lower depth is often desirable because noisy hardware has limited coherence time. Topic: quantum computing / circuit depth