pygsti.tools.errgenproptools.slow_bulk_phi

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pygsti.tools.errgenproptools.slow_bulk_phi#

slow_bulk_phi(tableau, desired_bitstring, Ps, Qs)#

Computes the phi function for multiple (P, Q) pairs at once while caching and reusing intermediate values computed via pauli_phase_update_all_zeros and amplitude_of_state.

Parameters:

  • tableau (stim.Tableau or stim.TableauSimulator) – A stim Tableau or TableauSimulator corresponding to the input stabilizer state.

  • desired_bitstring (str) – A string of zeros and ones corresponding to the measured bitstring.

  • Ps (list[Union[str, stim.PauliString]]) – List of Pauli string indices for the first operator in each phi computation. Can be either a string or a stim.PauliString (but all values are assumed to be the same type).

  • Qs (list[Union[str, stim.PauliString]]) – List of Pauli string indices for the second operator in each phi computation. Can be either a string or a stim.PauliString (but all values are assumed to be the same type).

Returns:

An array of computed phi values. Each phi will be one of {0, ±1, ±i}.

Return type:

np.ndarray[np.complex128]

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