def bloch_vector_of(self, qubit: 'cirq.Qid') -> np.ndarray:
"""Returns the bloch vector of a qubit in the state.
Calculates the bloch vector of the given qubit
in the state given by self.state_vector(), given that
self.state_vector() follows the standard Kronecker convention of
numpy.kron.
Args:
qubit: qubit who's bloch vector we want to find.
Returns:
A length 3 numpy array representing the qubit's bloch vector.
Raises:
ValueError: if the size of the state represents more than 25 qubits.
IndexError: if index is out of range for the number of qubits
corresponding to the state.
"""
return qis.bloch_vector_from_state_vector(self.state_vector(),
self.qubit_map[qubit],
qid_shape=self._qid_shape)
def bloch_vector_from_state_vector(*args, **kwargs):
return qis.bloch_vector_from_state_vector(*args, **kwargs)
