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Solving Large-Scale Vehicle Routing Problems with Hybrid Quantum-Classical Decomposition

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arxiv 2507.05373 v1 pith:RPHRZCPI submitted 2025-07-07 quant-ph

Solving Large-Scale Vehicle Routing Problems with Hybrid Quantum-Classical Decomposition

classification quant-ph
keywords decompositionquantumsolvingalgorithmdemonstrateencodinghybridnumber
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We present a two-level decomposition strategy for solving the Vehicle Routing Problem (VRP) using the Quantum Approximate Optimization Algorithm. A Problem-Level Decomposition partitions a 13-node (156-qubit) VRP into smaller Traveling Salesman Problem (TSP) instances. Each TSP is then further cut via Circuit-Level Decomposition, enabling execution on near-term quantum devices. Our approach achieves up to 95\% reductions in the circuit depth, 96\% reduction in the number of qubits and a 99.5\% reduction in the number of 2-qubit gates. We demonstrate this hybrid algorithm on the standard edge encoding of the VRP as well as a novel amplitude encoding. These results demonstrate the feasibility of solving VRPs previously too complex for quantum simulators and provide early evidence of potential quantum utility.

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Cited by 7 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. HybridQC: Hardware-Grounded Simulation of Tightly Integrated Hybrid Quantum-Classical Systems

    cs.PF 2026-07 conditional novelty 6.0

    HybridQC is a hardware-calibrated, topology-aware simulator that predicts hybrid quantum-classical system bottlenecks, finding that balanced 10x scaling yields only 2.19x-3.42x makespan improvement and that workload g...

  2. Scalable quantum circuit knitting using a weak-coupling approximation

    quant-ph 2026-06 unverdicted novelty 6.0

    A weak-coupling approximation reduces classical overhead in quantum circuit knitting to polynomial cost when one qubit couples weakly to others, shown on QAOA-style layered circuits.

  3. Versioned Late Materialization for Ultra-Long Sequence Training in Recommendation Systems at Scale

    cs.IR 2026-04 unverdicted novelty 6.0

    Versioned late materialization stores user histories once and reconstructs sequences just-in-time during training to cut redundancy and enable longer sequences in large-scale recommendation systems.

  4. Hierarchical QAOA for the Vehicle Routing Problem via Clustered Decomposition and Local Feasibility Repair

    quant-ph 2025-11 unverdicted novelty 6.0

    Hierarchical clustered decomposition plus local repair lets standard QAOA solve 13-node two-vehicle VRP instances using 12 qubits per subproblem with approximation ratios 1.2-1.5 versus Gurobi.

  5. From Prototype to Classroom: An Intelligent Tutoring System for Quantum Education

    cs.CY 2026-04 unverdicted novelty 5.0

    ITAS, a multi-agent tutoring system with quantum-specialized LLM agents, cloud infrastructure, and analytics, was deployed in a real quantum computing course and provided evidence that agent specialization improves re...

  6. Versioned Late Materialization for Ultra-Long Sequence Training in Recommendation Systems at Scale

    cs.IR 2026-04 unverdicted novelty 5.0

    Introduces versioned late materialization to eliminate data redundancy in ultra-long sequence training for DLRMs by storing histories once and reconstructing via pointers at training time.

  7. Distributed Quantum-Enhanced Optimization: A Topographical Preconditioning Approach for High-Dimensional Search

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    D-QEO framework uses quantum topographical preconditioning on separable functions via small parallel subcircuits to generate seeds that accelerate classical global optimization and avoid exponential failure rates.