Optimizing the Annoying Stuff - Reducing Costs Obscured by the Abstract Circuit Model

Explore quantum computing optimization beyond traditional gate count and depth metrics in this 33-minute conference talk from Quantum Industry Day 2025. Discover how factors not typically expressed in quantum logic circuits can dramatically impact algorithm performance, with examples showing over 10x cost reductions achieved purely through routing changes and compilation improvements. Learn about specific enhancements to ripple carry adders that focus on the often-overlooked "annoying stuff" including routing optimization and magic state consumption reduction. Examine the advantages of diagrammatic languages such as ZX graphs and defect diagrams for expressing and implementing these critical optimizations that go beyond simple logical gate operations.