scqubits.utils.spectrum_utils.get_eigenstate_index_maxoverlap#

scqubits.utils.spectrum_utils.get_eigenstate_index_maxoverlap(eigenstates_qobj, reference_state_qobj, return_overlap=False)[source]#

For given list of qutip states, find index of the state that has largest overlap with the qutip ket reference_state_qobj. If |overlap| is smaller than 0.5, return None.

Parameters:

  • eigenstates_qobj (QutipEigenstates) – as obtained from qutip .eigenstates()

  • reference_state_qobj (Qobj) – specific reference state

  • return_overlap (bool) – set to true if the value of largest overlap should be also returned (default value = False)

Return type:

Union[int, Tuple[int, float], None]

Returns:

index of eigenstate from eigenstates_Qobj with the largest overlap with the reference_state_qobj, None if |overlap|<0.5