A quantum circuit simulator and its applications on Sunway TaihuLight supercomputer

TL;DR

This paper introduces a versatile and efficient quantum circuit simulator developed for the Sunway TaihuLight supercomputer, capable of simulating large quantum systems and supporting various quantum operations and noise effects.

Contribution

The paper presents a novel quantum circuit simulator with a three-part structure, optimized for Sunway TaihuLight, enabling large-scale simulations up to 200 qubits and supporting diverse quantum functionalities.

Findings

Simulates 40, 75, and 200 qubits for full, partial, and single amplitudes.

Supports noise emulation and various quantum operations.

Demonstrates applications in quantum algorithms like Poisson solver and transcendental function evaluation.

Abstract

Classical simulation of quantum computation is vital for verifying quantum devices and assessing quantum algorithms. We present a new quantum circuit simulator developed on the Sunway TaihuLight supercomputer. Compared with other simulators, the present one is distinguished in two aspects. First, our simulator is more versatile. The simulator consists of three mutually independent parts to compute the full, partial and single amplitudes of a quantum state with different methods. It has the function of emulating the effect of noise and support more kinds of quantum operations. Second, our simulator is of high efficiency. The simulator is designed in a two-level parallel structure to be implemented efficiently on the distributed many-core Sunway TaihuLight supercomputer. Random quantum circuits can be simulated with 40, 75 and 200 qubits on the full, partial and single amplitude, respectively. As illustrative applications of the simulator, we present a quantum fast Poisson solver and an algorithm for quantum arithmetic of evaluating transcendental functions. Our simulator is expected to have broader applications in developing quantum algorithms in various fields.