Deep Quantum Circuit Simulations of Low-Energy Nuclear States

TL;DR

This paper introduces advanced numerical simulation techniques for deep quantum circuits, enabling efficient verification of low-energy nuclear states on high-performance computing systems with circuits up to 21 qubits and over 115 million gates.

Contribution

It presents novel methods for accelerating quantum circuit simulations, including gate fusion and mid-circuit measurement management, to verify complex nuclear physics applications.

Findings

Simulated circuits up to 21 qubits and 115 million gates efficiently.

New gate fusion techniques improve simulation speed.

Effective management of mid-circuit measurements enhances verification accuracy.

Abstract

Numerical simulation is an important method for verifying the quantum circuits used to simulate low-energy nuclear states. However, real-world applications of quantum computing for nuclear theory often generate deep quantum circuits that place demanding memory and processing requirements on conventional simulation methods. Here, we present advances in high-performance numerical simulations of deep quantum circuits to efficiently verify the accuracy of low-energy nuclear physics applications. Our approach employs several novel methods for accelerating the numerical simulation including 1- and 2-qubit gate fusion techniques as well as management of simulated mid-circuit measurements to verify state preparation circuits. We test these methods across a variety of high-performance computing systems and our results show that circuits up to 21 qubits and more than 115,000,000 gates can be efficiently simulated.