31 lines
1.2 KiB
Plaintext
31 lines
1.2 KiB
Plaintext
---
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title: thermal_relaxation_values
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description: API reference for qiskit.providers.aer.noise.device.thermal_relaxation_values
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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.noise.device.thermal_relaxation_values
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---
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# qiskit.providers.aer.noise.device.thermal\_relaxation\_values
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<Function id="qiskit.providers.aer.noise.device.thermal_relaxation_values" isDedicatedPage={true} github="https://github.com/qiskit/qiskit-aer/tree/stable/0.8/qiskit/providers/aer/noise/device/parameters.py" signature="thermal_relaxation_values(properties)">
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Return T1, T2 and frequency values from a devices BackendProperties.
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**Parameters**
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**properties** ([*BackendProperties*](qiskit.providers.models.BackendProperties "qiskit.providers.models.BackendProperties")) – device backend properties
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**Returns**
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A list of tuples `(T1, T2, freq)` for each qubit in the device. If $T_1$, $T_2$, or frequency cannot be found for qubit a value of `Numpy.inf` will be used.
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**Return type**
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list
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## Additional Information:
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$T_1$ and $T_2$ values are returned in microsecond (µs) units. Frequency is returned in gigahertz (GHz) units.
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</Function>
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