Cache Blocking Technique to Large Scale Quantum Computing Simulation on Supercomputers

TL;DR

This paper introduces a cache blocking method using swap gates to reduce data movement in large-scale quantum circuit simulations, improving scalability on supercomputers.

Contribution

It presents a novel cache blocking technique with swap gates integrated into Qiskit Aer to enhance quantum simulation scalability on GPU clusters.

Findings

Improved scalability of quantum simulations on GPU clusters.

Effective reduction of data movement through cache blocking.

Successful implementation in an open-source framework.

Abstract

Classical computers require large memory resources and computational power to simulate quantum circuits with a large number of qubits. Even supercomputers that can store huge amounts of data face a scalability issue in regard to parallel quantum computing simulations because of the latency of data movements between distributed memory spaces. Here, we apply a cache blocking technique by inserting swap gates in quantum circuits to decrease data movements. We implemented this technique in the open source simulation framework Qiskit Aer. We evaluated our simulator on GPU clusters and observed good scalability.