33 lines
1.6 KiB
Plaintext
33 lines
1.6 KiB
Plaintext
---
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title: save_density_matrix (v0.26)
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description: API reference for qiskit.providers.aer.library.save_density_matrix in qiskit v0.26
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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.providers.aer.library.save_density_matrix
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---
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<span id="qiskit-providers-aer-library-save-density-matrix" />
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# qiskit.providers.aer.library.save\_density\_matrix
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<Function id="qiskit.providers.aer.library.save_density_matrix" isDedicatedPage={true} github="https://github.com/qiskit/qiskit-aer/tree/stable/0.8/qiskit/providers/aer/library/save_instructions/save_density_matrix.py" signature="save_density_matrix(self, qubits=None, label='density_matrix', unnormalized=False, pershot=False, conditional=False)">
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Save the current simulator quantum state as a density matrix.
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**Parameters**
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* **qubits** (*list or None*) – the qubits to save reduced density matrix on. If None the full density matrix of qubits will be saved \[Default: None].
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* **label** (*str*) – the key for retrieving saved data from results.
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* **unnormalized** (*bool*) – If True return save the unnormalized accumulated or conditional accumulated density matrix over all shots \[Default: False].
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* **pershot** (*bool*) – if True save a list of density matrices for each shot of the simulation rather than the average over all shots \[Default: False].
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* **conditional** (*bool*) – if True save the average or pershot data conditional on the current classical register values \[Default: False].
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**Returns**
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with attached instruction.
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**Return type**
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[QuantumCircuit](qiskit.circuit.QuantumCircuit "qiskit.circuit.QuantumCircuit")
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</Function>
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