A parallelized amplitude estimation algorithm achieves near-Heisenberg query complexity with logarithmic circuit depth by combining a GHZ state with QSP-based phase shifters.
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Near-Heisenberg-limited parallel amplitude estimation with logarithmic depth circuit
A parallelized amplitude estimation algorithm achieves near-Heisenberg query complexity with logarithmic circuit depth by combining a GHZ state with QSP-based phase shifters.