[Paper] DynQ: A Dynamic Topology-Agnostic Quantum Virtual Machine via Quality-Weighted Community Detection
Source: arXiv - 2601.19635v1
Overview
Quantum cloud platforms remain fundamentally non‑virtualised: despite rapid hardware scaling, each user program still monopolises an entire quantum processor, preventing resource sharing, economic scalability, and quality‑of‑service differentiation. Existing Quantum Virtual Machine (QVM) designs attempt spatial multiplexing through topology‑specific or template‑based partitioning, but these approaches are brittle under hardware heterogeneity, calibration drift, and transient defects, which dominate real quantum devices.
We present DynQ, the first dynamic, topology‑agnostic Quantum Virtual Machine that virtualises quantum hardware using quality‑weighted community detection. Instead of imposing fixed geometric regions, DynQ models a quantum processor as a weighted graph derived from live calibration data and automatically discovers execution regions that maximise internal gate quality while minimising inter‑region coupling. This operationalises the classical virtualisation principle of high cohesion and low coupling in a quantum‑native setting, producing execution regions that are connectivity‑efficient, noise‑aware, and resilient to crosstalk and defects.
We evaluate DynQ across five IBM Quantum backends using calibration‑derived noise simulation and on two production devices, comparing against state‑of‑the‑art QVM and standard compilation baselines. On hardware with pronounced spatial quality variation, DynQ achieves up to 19.1 % higher fidelity and 45.1 % lower output error. When transient hardware defects cause baseline executions to fail completely, DynQ adapts dynamically and achieves over 86 % fidelity. By transforming calibrated device graphs into adaptive virtual hardware abstractions, DynQ decouples quantum programs from fragile physical layouts and enables reliable, high‑utilisation quantum cloud services.
Key Contributions
- quant‑ph
- cs.SE
Methodology
Please refer to the full paper for detailed methodology.
Practical Implications
This research contributes to the advancement of quant‑ph.
Authors
- Shusen Liu
- Pascal Jahan Elahi
- Ugo Varetto
Paper Information
- arXiv ID: 2601.19635v1
- Categories: quant‑ph, cs.SE
- Published: January 27, 2026
- PDF: Download PDF