36 lines
1.3 KiB
Plaintext
36 lines
1.3 KiB
Plaintext
---
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title: random_quantum_channel
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description: API reference for qiskit.quantum_info.random_quantum_channel
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in_page_toc_min_heading_level: 1
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python_api_type: function
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python_api_name: qiskit.quantum_info.random_quantum_channel
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---
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# qiskit.quantum\_info.random\_quantum\_channel
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<Function id="qiskit.quantum_info.random_quantum_channel" isDedicatedPage={true} github="https://github.com/qiskit/qiskit/tree/stable/0.23/qiskit/quantum_info/operators/random.py" signature="random_quantum_channel(input_dims=None, output_dims=None, rank=None, seed=None)">
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Return a random CPTP quantum channel.
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This constructs the Stinespring operator for the quantum channel by sampling a random isometry from the unitary Haar measure.
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**Parameters**
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* **input\_dims** (*int or tuple*) – the input dimension of the channel.
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* **output\_dims** (*int or tuple*) – the input dimension of the channel.
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* **rank** (*int*) – Optional. The rank of the quantum channel Choi-matrix.
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* **seed** (*int or np.random.Generator*) – Optional. Set a fixed seed or generator for RNG.
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**Returns**
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a quantum channel operator.
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**Return type**
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[Stinespring](qiskit.quantum_info.Stinespring "qiskit.quantum_info.Stinespring")
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**Raises**
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**QiskitError** – if rank or dimensions are invalid.
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</Function>
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