SurgeQ: A Hybrid Framework for Ultra-Fast Quantum Processor Design and Crosstalk-Aware Circuit Execution

TL;DR

SurgeQ is a hardware-software co-design framework that accelerates quantum circuit execution and enhances fidelity on superconducting platforms by optimizing gate speed and crosstalk mitigation.

Contribution

It introduces a novel co-design approach with tailored scheduling and noise modeling to improve quantum circuit fidelity and execution speed.

Findings

Achieves up to a million-fold fidelity improvement in large circuits.

Effectively mitigates crosstalk while using faster two-qubit gates.

Outperforms existing baselines in real-world benchmarks.

Abstract

Executing quantum circuits on superconducting platforms requires balancing the trade-off between gate errors and crosstalk. To address this, we introduce SurgeQ, a hardware-software co-design strategy consisting of a design phase and an execution phase, to achieve accelerated circuit execution and improve overall program fidelity. SurgeQ employs coupling-strengthened, faster two-qubit gates while mitigating their increased crosstalk through a tailored scheduling strategy. With detailed consideration of composite noise models, we establish a systematic evaluation pipeline to identify the optimal coupling strength. Evaluations on a comprehensive suite of real-world benchmarks show that SurgeQ generally achieves higher fidelity than up-to-date baselines, and remains effective in combating exponential fidelity decay, achieving up to a million-fold improvement in large-scale circuits.