A quantum algorithm estimates fidelity susceptibility in O~(1/epsilon) queries using a resolvent reformulation, achieving Heisenberg-limited precision.
Fidelity approach to quantum phase tran- sitions
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Heisenberg limited quantum algorithm for estimating the fidelity susceptibility
A quantum algorithm estimates fidelity susceptibility in O~(1/epsilon) queries using a resolvent reformulation, achieving Heisenberg-limited precision.