Quantum Volume (QV) | Comprehensive Holistic Hardware Benchmark
Quick Technical Answer:
Quantum Volume (QV) is a hardware-agnostic metric developed by IBM that measures the overall computational power of a quantum processor by quantifying the largest square circuit (width m = depth d) the machine can execute successfully (log₂ QV = m).
Formula / Unitary:
V_Q = 2^d, \quad h_d = \frac{n_c - 2\sqrt{n_c(1-p_h)}}{\dots} > \frac{2}{3}
Simulate this in Itachi Quantum Studio
Inspect state amplitudes, 3D Bloch sphere vector, and OpenQASM code live.
Frequently Asked Questions
Why is Quantum Volume better than raw physical qubit count?
A quantum processor with 1,000 noisy qubits and high error rates may have a lower Quantum Volume than a calibrated 30-qubit processor with high gate fidelity, low crosstalk, and long coherence times.