2026/04/29 by Mar Tejedor, Javier Conejero, Rosa M. Badia · 1 voice
Computer Science · Materials Science · Physics and Astronomy · #Bottleneck #Cache #Heuristics #Machine Learning in Materials Science #Parallel Computing and Optimization Techniques #Quantum Computing Algorithms and Architecture #Quantum circuit #Redundancy (engineering) #Reuse #Scalability #Speedup #Workflow #cs.DC #quant-ph
paper · pdf · doi:10.48550/arxiv.2604.26788
openalex publication_date 2026/04/29 · arxiv published 2026/04/29 · arxiv updated 2026/04/29 · openalex created_date 2026/05/01 · openalex updated_date 2026/07/28
Hybrid quantum--classical workflows often execute large ensembles of circuits that differ syntactically but implement identical operations, leading to substantial redundant computation. To address this, we introduce the Quantum Circuit Cache, a content-addressable system that detects semantic equivalence and reuses previously computed results across executions, backends, and workflow stages. Our approach combines ZX-calculus reduction with isomorphism-invariant Weisfeiler--Leman graph hashing to generate deterministic circuit identifiers, enabling constant-time lookup in distributed caches supporting both lightweight LMDB and scalable Redis deployments. The system integrates transparently into hybrid HPC workflows and remains backend-agnostic across CPU, GPU, and QPU environments. We evaluate the system on MareNostrum 5 with two representative workloads: distributed wire cutting and Differential Evolution-based QAOA optimization. For wire cutting, caching eliminates up to 91.98% of redundant subcircuit simulations, yielding speedups up to 7.0 times on a single node and maintaining advantages at scale, with Redis-based caching achieving up to 1.6 times speedups under high parallelism. Validation on a 35-qubit superconducting QPU confirms these benefits, achieving an 11.2 times speedup on real hardware. In distributed QAOA optimization, equivalence-aware caching avoids up to 27.6% of circuit evaluations and consistently reduces execution cost without altering the optimization algorithm. In both cases, reuse grows with concurrency and circuit structure, highlighting redundancy as a major systems bottleneck and demonstrating the effectiveness of our Quantum Circuit Cache.