A Ramsey-type interferometry method that extracts the absolute ground-state energy from the frequency of oscillations between the ground state and a symmetry-adapted reference state, avoiding controlled time evolutions.
Both states|ψGHZ⟩ and|ψ′ GHZ⟩ are eigenstates of a parity operator defined asˆP = ˆσx 1⊗ ˆσx 2⊗···⊗ ˆσx N
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Robust phase estimation of the ground-state energy without controlled time evolution on a quantum device
A Ramsey-type interferometry method that extracts the absolute ground-state energy from the frequency of oscillations between the ground state and a symmetry-adapted reference state, avoiding controlled time evolutions.