Subgroup-based symmetrization of quantum ansatzes raises circuit cost and lowers expressibility as the symmetry subgroup grows, while often raising entangling capability.
2019.Quantum information in the real world
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Twirlator: A Pipeline for Analyzing Subgroup Symmetry Effects in Quantum Machine Learning Ansatzes
Subgroup-based symmetrization of quantum ansatzes raises circuit cost and lowers expressibility as the symmetry subgroup grows, while often raising entangling capability.