Classical vs. Quantum Error Rate Comparison

This MicroSim uses a horizontal bar chart on a logarithmic scale to compare the error rates of classical computing components with current quantum computing hardware. The visualization makes the enormous gap between classical and quantum reliability immediately apparent — a gap spanning roughly 10 to 14 orders of magnitude.

View Error Rate Comparison MicroSim Fullscreen

How to Use This Chart

• Hover over any bar to see the exact error rate and source citation.
• Use the Log Scale / Linear Scale toggle buttons to switch between a logarithmic view (which reveals the full range) and a linear view (which dramatically illustrates how quantum error rates dominate).
• The red dashed line marks the quantum error correction (QEC) threshold at \(10^{-4}\). Quantum hardware must achieve error rates below this line before error correction schemes can even begin to work.

What to Notice

Classical computing operates at error rates between \(10^{-18}\) and \(10^{-14}\) per operation — so reliable that errors are essentially invisible in normal use. Quantum gates, by contrast, currently fail at rates between \(10^{-4}\) and \(10^{-1}\) per operation. This gap is not a minor engineering shortfall; it represents a fundamental difference in the physical reliability of the two computing paradigms.

When you switch to linear scale, the classical bars vanish entirely because their error rates are indistinguishable from zero at quantum scales. That visual disappearance is itself the argument: classical computing solved its reliability problem decades ago, while quantum computing has not yet crossed even the theoretical threshold needed for error correction to function.