Empowering Large Scale Quantum Circuit Development: Effective Simulation of Sycamore Circuits

TL;DR

This paper demonstrates that large, complex quantum circuits, including Google's quantum supremacy circuits, can be effectively simulated on classical systems using the Quantum Rings SDK, enabling accessible development and testing.

Contribution

It introduces a method for high-fidelity classical simulation of large quantum circuits, surpassing current benchmarks and facilitating quantum algorithm development before quantum hardware matures.

Findings

Achieved an average XEB score of 0.678, indicating strong correlation with ideal quantum results.

Successfully simulated large-scale circuits with high fidelity on standard classical hardware.

Completed circuit execution within reasonable timeframes, demonstrating practical feasibility.

Abstract

Simulating quantum systems using classical computing equipment has been a significant research focus. This work demonstrates that circuits as large and complex as the random circuit sampling (RCS) circuits published as a part of Google's pioneering work [4-7] claiming quantum supremacy can be effectively simulated with high fidelity on classical systems commonly available to developers, using the universal quantum simulator included in the Quantum Rings SDK, making this advancement accessible to everyone. This study achieved an average linear cross-entropy benchmarking (XEB) score of 0.678, indicating a strong correlation with ideal quantum simulation and exceeding the XEB values currently reported for the same circuits today while completing circuit execution in a reasonable timeframe. This capability empowers researchers and developers to build, debug, and execute large-scale quantum circuits ahead of the general availability of low-error rate quantum computers and invent new quantum algorithms or deploy commercial-grade applications.