39 lines
1.6 KiB
Plaintext
39 lines
1.6 KiB
Plaintext
---
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title: twoQ_clifford_error (v0.31)
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description: API reference for qiskit.ignis.verification.twoQ_clifford_error in qiskit v0.31
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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.ignis.verification.twoQ_clifford_error
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---
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<span id="qiskit-ignis-verification-twoq-clifford-error" />
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# qiskit.ignis.verification.twoQ\_clifford\_error
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<Function id="qiskit.ignis.verification.twoQ_clifford_error" isDedicatedPage={true} github="https://github.com/qiskit-community/qiskit-ignis/tree/stable/0.6/qiskit/ignis/verification/randomized_benchmarking/rb_utils.py" signature="twoQ_clifford_error(ngates, gate_qubit, gate_err)">
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The two qubit Clifford gate error given measured errors in the primitive gates used to construct the Clifford (see arxiv:1712.06550). Assumes the error in the underlying gates is depolarizing.
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**Parameters**
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* **ngates** (`Dict`\[`int`, `Dict`\[`str`, `float`]]) – list of the number of gates per 2Q Clifford.
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* **gate\_qubit** (`List`\[`int`]) – list of the qubit corresponding to the gate (0, 1 or -1). -1 corresponds to the 2Q gate. Note that 0 (1) corresponds to the single qubit gate counts in `ngates` which has smaller (larger) qubit index.
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* **gate\_err** (`List`\[`float`]) – list of the gate errors.
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<Admonition title="Note" type="note">
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This function presupposes the basis gate consists of `u1`, `u2`, `u3` and `cx`.
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</Admonition>
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**Returns**
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Error per 2Q Clifford.
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**Return type**
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float
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**Raises**
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**QiskitError** – when number of qubit contained in `ngates` is not 2.
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</Function>
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