Implementation of a pauli observable structure #20
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lvignoli
requested changes
Mar 16, 2023
| function PauliObs_to_string(obs::PauliObs)::String | ||
| string = collect("I"^obs.n_qubits) | ||
| for p in obs.pauli | ||
| string[p[1]] = p[2] |
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Since p is a dict, it would be nice to use it as such.
| n_qubits = length(obs) | ||
| pauli = Dict{Int64, Char}() | ||
| for i in 1:n_qubits | ||
| if obs[i] != 'I' |
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There is now guarantee that obs[i] is 'X', 'Y' or 'Z'.
obs should be validate using re_pauli_string in observables.jl before parsing.
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Implement an efficient structure to store Pauli observables. It uses a dictionnary which keys are integers corresponding to positions where the observable is different from identity, the value associated is the corresponding observable (X, Y or Z).
Classical Shadows estimations (robust and standard) have been adapted to this structure. Derandomization and other procedures have yet to be adapted.