qiskit.quantum_info.random_quantum_channel

random_quantum_channel(input_dims=None, output_dims=None, rank=None, seed=None)

Return a random CPTP quantum channel.

This constructs the Stinespring operator for the quantum channel by sampling a random isometry from the unitary Haar measure.

Parameters

• input_dims (int or tuple) – the input dimension of the channel.
• output_dims (int or tuple) – the input dimension of the channel.
• rank (int) – Optional. The rank of the quantum channel Choi-matrix.
• seed (int or np.random.Generator) – Optional. Set a fixed seed or generator for RNG.

Returns

a quantum channel operator.

Return type

Stinespring

Raises

QiskitError – if rank or dimensions are invalid.