Fifth-order Taylor truncation enables O(Nz) state updates in adaptive VQE by chaining sparse matrix-vector products, preserving >0.999999 fidelity and subchemical accuracy on 12-14 qubit systems.
Shot-efficient adapt-vqe via reused pauli measure- ments and variance-based shot allocation,
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Alleviating the Sparse Matrix Scaling Bottleneck in Adaptive VQE via High-Order Taylor State Evolution
Fifth-order Taylor truncation enables O(Nz) state updates in adaptive VQE by chaining sparse matrix-vector products, preserving >0.999999 fidelity and subchemical accuracy on 12-14 qubit systems.