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---
title: save_density_matrix (v0.26)
description: API reference for qiskit.providers.aer.library.save_density_matrix in qiskit v0.26
in_page_toc_min_heading_level: 1
python_api_type: function
python_api_name: qiskit.providers.aer.library.save_density_matrix
---
<span id="qiskit-providers-aer-library-save-density-matrix" />
# qiskit.providers.aer.library.save\_density\_matrix
<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)">
Save the current simulator quantum state as a density matrix.
**Parameters**
* **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].
* **label** (*str*) the key for retrieving saved data from results.
* **unnormalized** (*bool*) If True return save the unnormalized accumulated or conditional accumulated density matrix over all shots \[Default: False].
* **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].
* **conditional** (*bool*) if True save the average or pershot data conditional on the current classical register values \[Default: False].
**Returns**
with attached instruction.
**Return type**
[QuantumCircuit](qiskit.circuit.QuantumCircuit "qiskit.circuit.QuantumCircuit")
</Function>