Quantum computing enhanced computational catalysis

TL;DR

This paper demonstrates advanced quantum algorithms that significantly improve the accuracy and efficiency of quantum computing for catalytic reaction energy calculations, focusing on ruthenium-catalyzed CO2 transformation.

Contribution

It introduces new quantum algorithms with over tenfold improvements for energy measurements in computational catalysis, addressing resource estimation and active space challenges.

Findings

Over an order of magnitude improvement in quantum algorithms.

Successful modeling of ruthenium catalysis for CO2 to methanol conversion.

Discussion of hardware requirements for practical quantum advantage.

Abstract

The quantum computation of electronic energies can break the curse of dimensionality that plagues many-particle quantum mechanics. It is for this reason that a universal quantum computer has the potential to fundamentally change computational chemistry and materials science, areas in which strong electron correlations present severe hurdles for traditional electronic structure methods. Here, we present a state-of-the-art analysis of accurate energy measurements on a quantum computer for computational catalysis, using improved quantum algorithms with more than an order of magnitude improvement over the best previous algorithms. As a prototypical example of local catalytic chemical reactivity we consider the case of a ruthenium catalyst that can bind, activate, and transform carbon dioxide to the high-value chemical methanol. We aim at accurate resource estimates for the quantum computing steps required for assessing the electronic energy of key intermediates and transition states of its catalytic cycle. In particular, we present new quantum algorithms for double-factorized representations of the four-index integrals that can significantly reduce the computational cost over previous algorithms, and we discuss the challenges of increasing active space sizes to accurately deal with dynamical correlations. We address the requirements for future quantum hardware in order to make a universal quantum computer a successful and reliable tool for quantum computing enhanced computational materials science and chemistry, and identify open questions for further research.