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This research introduces a graph-based representation that streamlines quantum circuit construction for variational quantum eigensolver (VQE) methods. By leveraging a direct link between ADAPT gradient magnitudes and Hamiltonian couplings, the technique eliminates resource-intensive iterative measurements while maintaining chemical accuracy across 8–20 qubit benchmarks. The approach significantly reduces computational costs by bypassing traditional screening bottlenecks without requiring model training.
A graph-based method cuts quantum circuit building costs

A new heterogeneous graph representation streamlines quantum circuit building, reducing costs by enabling training-free operator selection.
Hao Li, Chaoqun Ji, and Mengbo Fu of University of Chinese Academy of Sciences have developed a method for building quantum circuits that bypasses a major computational hurdle. The researchers use a graph to represent…
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