Demonstrating Quantum Computation for Quasiparticle Band Structures

TL;DR

This paper demonstrates the first quantum-computer-based calculation of quasiparticle band structures in solid-state materials, utilizing hybrid algorithms with error mitigation to advance practical quantum applications in material science.

Contribution

It introduces a novel approach combining quantum algorithms with error mitigation for calculating quasiparticle band structures on real quantum hardware.

Findings

Successful demonstration of quasiparticle band structure calculation on quantum computers

Implementation of hybrid quantum-classical algorithms with qubit reduction techniques

Paves the way for practical quantum computing applications in material science

Abstract

Understanding and predicting the properties of solid-state materials from first-principles has been a great challenge for decades. Owing to the recent advances in quantum technologies, quantum computations offer a promising way to achieve this goal. Here, we demonstrate the first-principles calculation of a quasiparticle band structure on actual quantum computers. This is achieved by hybrid quantum-classical algorithms in conjunction with qubit-reduction and error-mitigation techniques. Our demonstration will pave the way to practical applications of quantum computers.