A two-phase VQE that penalizes iteration-to-iteration changes in the 1-RDM improves molecular properties and, in a small active space, energy accuracy relative to CISD.
Evaluating the evidence for exponential quantum advantage in ground-state quantum chemistry
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Effects of One-particle Reduced Density Matrix Optimization in Variational Quantum Eigensolvers
A two-phase VQE that penalizes iteration-to-iteration changes in the 1-RDM improves molecular properties and, in a small active space, energy accuracy relative to CISD.