plot_bloch_multivector

plot_bloch_multivector(rho, title='', figsize=None)

Plot the Bloch sphere.

Plot a sphere, axes, the Bloch vector, and its projections onto each axis.

Parameters

• rho (ndarray) – Numpy array for state vector or density matrix.
• title (str) – a string that represents the plot title
• figsize (tuple) – Has no effect, here for compatibility only.

Returns

A matplotlib figure instance.

Return type

matplotlib.Figure

Raises

ImportError – Requires matplotlib.

Example

from qiskit import QuantumCircuit, BasicAer, execute
from qiskit.visualization import plot_bloch_multivector
%matplotlib inline
 
qc = QuantumCircuit(2, 2)
qc.h(0)
qc.cx(0, 1)
qc.measure([0, 1], [0, 1])
 
backend = BasicAer.get_backend('statevector_simulator')
job = execute(qc, backend).result()
plot_bloch_multivector(job.get_statevector(qc), title="New Bloch Multivector")