Implementing Jastrow-Gutzwiller operators on a quantum computer using the cascaded variational quantum eigensolver algorithm
John Stenger, C. Stephen Hellberg, Daniel Gunlycke · Physical Review A · 2023
A Jastrow-Gutzwiller operator adds many-body correlations to a quantum state. However, the operator is nonunitary, making it difficult to implement directly on a quantum computer. We present an 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.