VQA Labs
Interactive experiments — variational circuits, cost landscapes, and optimization
Parameterized Circuit Lab
Build a 1-qubit ansatz with rotation gates — watch the state evolve on the Bloch sphere
Cost Landscape Explorer
Visualize the 2D cost surface of a variational circuit — gradient field, critical points, heatmap
Barren Plateau Detector
Measure gradient variance vs qubit count and depth — reproduce the exponential decay
Optimization Dynamics
Race gradient descent, Adam, and SPSA on the same landscape — compare trajectories
Shot Noise Explorer
Finite measurement statistics — see how shot count and state angle affect estimation variance