SpinQ: Compilation strategies for scalable spin-qubit architectures

TL;DR

SpinQ introduces a novel compilation framework tailored for scalable spin-qubit architectures, addressing unique hardware constraints and achieving efficient mapping with linear complexity, thereby advancing quantum circuit execution on emerging spin-based quantum processors.

Contribution

The paper presents SpinQ, the first native compilation framework for scalable spin-qubit architectures, with an integrated strategy that ensures scalable mapping considering operational constraints.

Findings

SpinQ achieves O(n) computational complexity in mapping.

Evaluation shows reduced gate and depth overheads.

Proposes new mapping techniques to improve success rates.

Abstract

Despite NISQ devices being severely constrained, hardware- and algorithm-aware quantum circuit mapping techniques have been developed to enable successful algorithm executions. Not so much attention has been paid to mapping and compilation implementations for spin-qubit quantum processors due to the scarce availability of experimental devices and their small sizes. However, based on their high scalability potential and their rapid progress it is timely to start exploring solutions on such devices. In this work, we discuss the unique mapping challenges of a scalable crossbar architecture with shared control and introduce SpinQ, the first native compilation framework for scalable spin-qubit architectures. At the core of SpinQ is the Integrated Strategy that addresses the unique operational constraints of the crossbar while considering compilation scalability and obtaining a O(n) computational complexity. To evaluate the performance of SpinQ on this novel architecture, we compiled a broad set of well-defined quantum circuits and performed an in-depth analysis based on multiple metrics such as gate overhead, depth overhead, and estimated success probability, which in turn allowed us to create unique mapping and architectural insights. Finally, we propose novel mapping techniques that could increase algorithm success rates on this architecture and potentially inspire further research on quantum circuit mapping for other scalable spin-qubit architectures.