17 / 34 Algorithms & Fault Tolerance

Why is barren plateau a problem?

Why are barren plateaus problematic in variational quantum algorithms?

A

They make the parameterized circuit too shallow to represent the target state

B

They produce sharp optimization landscapes where gradients grow without bound

C

They produce flat optimization landscapes where gradients become very small

D

They trap the optimizer in a deep local minimum far from the ground state