These circuits have a width, meaning how many qubits are involved, and a depth, meaning the number of discrete time steps during which the circuit can run gates

These circuits have a width, meaning how many qubits are involved, and a depth, meaning the number of discrete time steps during which the circuit can run gates before the qubits decohere... The Quantum Volume protocol identifies the largest square-shaped circuit — one where the width and depth are equal https://medium.com/qiskit/what-is-quantum-volume-anyway-a4dff801c36f https://medium.com/qiskit/what-is-quantum-volume-anyway-a4df... Current state of the art is 20-qbits somehow equals a quantum volume of 2^19, which I don't get since 20^2 = 400. https://en.wikipedia.org/wiki/Quantum_volume https://en.wikipedia.org/wiki/Quantum_volume