MECH: Multi-Entry Communication Highway for Superconducting Quantum Chiplets

TL;DR

This paper introduces MECH, a multi-entry communication highway for superconducting quantum chiplets, improving communication efficiency and scalability in quantum computing architectures.

Contribution

It proposes a novel communication mechanism and compilation framework that enhance scalability and reduce circuit depth in quantum chiplet systems.

Findings

Significant reduction in circuit depth

Improved program concurrency

Enhanced compilation efficiency

Abstract

Chiplet architecture is an emerging architecture for quantum computing that could significantly increase qubit resources with its great scalability and modularity. However, as the computing scale increases, communication between qubits would become a more severe bottleneck due to the long routing distances. In this paper, we propose a multi-entry communication highway (MECH) mechanism to trade ancillary qubits for program concurrency, and build a compilation framework to efficiently manage and utilize the highway resources. Our evaluation shows that this framework significantly outperforms the baseline approach in both the circuit depth and the number of operations on typical quantum benchmarks. This implies a more efficient and less error-prone compilation of quantum programs.