title: The Advantage Gap description: This MicroSim presents a horizontal bar chart comparing classical and quantum computing performance across five key application domains: Cryptanalysis, Chemistry, Optimization, Machine Learning, and image: /sims/advantage-gap/advantage-gap.png og:image: /sims/advantage-gap/advantage-gap.png
The Advantage Gap
This MicroSim presents a horizontal bar chart comparing classical and quantum computing performance across five key application domains: Cryptanalysis, Chemistry, Optimization, Machine Learning, and Search. Each domain shows paired bars for the best classical result (green) and the best quantum result (orange), making the gap between them immediately visible.
A vertical dashed line marks the "Commercially Useful Threshold" — the approximate performance level required for a technology to deliver real business value. In every domain, classical computing clears this bar while quantum computing falls far short.
The Advantage Gap MicroSim
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Hover over any domain row to see specific benchmarks, including the largest problems solved by classical and quantum approaches and the scale of the gap between them. Notice that in no domain does quantum computing come close to matching classical performance on commercially relevant problems.
Key Takeaways
- Cryptanalysis: Classical methods have factored numbers with hundreds of digits; the largest quantum factorization is 21.
- Chemistry: Classical density functional theory handles dozens of electrons; quantum hardware manages only a few.
- Optimization: Classical solvers find near-optimal solutions for thousands of variables; quantum QAOA handles tens.
- Machine Learning: Classical models achieve state-of-the-art on all benchmarks; quantum ML shows no practical improvement.
- Search: Classical databases search billions of records in milliseconds; Grover's algorithm has not been demonstrated at useful scale.