A Jastrow--Gutzwiller operator adds many-body correlations to a quantum state. However, the operator is non-unitary, making it difficult to implement directly on a quantum computer. We present a novel implementation of the Jastrow--Gutzwiller operator using the cascaded variational quantum eigensolver algorithm. We demonstrate the method on IBM Q Lagos for a Hubbard model.
Cite
@article{arxiv.2305.19014,
title = {Implementing Jastrow--Gutzwiller operators on a quantum computer using the cascaded variational quantum eigensolver algorithm},
author = {John P. T. Stenger and C. Stephen Hellberg and Daniel Gunlycke},
journal= {arXiv preprint arXiv:2305.19014},
year = {2026}
}