Extensions to SQPE enable practical ground state energy estimation on early fault-tolerant quantum computers via negative-weight compilation, changepoint detection, and 2x sample reduction through Fourier symmetry.
Quantum phase estimation of multiple eigenvalues for small-scale (noisy) experiments,
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Statistical Quantum Phase Estimation: Extensions and Practical Considerations
Extensions to SQPE enable practical ground state energy estimation on early fault-tolerant quantum computers via negative-weight compilation, changepoint detection, and 2x sample reduction through Fourier symmetry.