A hierarchical prefix-tree algorithm identifies the dominant Pauli coefficients of sparse quantum states using Bell sampling on two copies, with sample-complexity bounds tied to the number of coefficients and state purity.
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Measuring the largest coefficients of a quantum state
A hierarchical prefix-tree algorithm identifies the dominant Pauli coefficients of sparse quantum states using Bell sampling on two copies, with sample-complexity bounds tied to the number of coefficients and state purity.