---
title: RateSpace (latest version)
description: API reference for qiskit_noise_learning.models.RateSpace in the latest version of qiskit-noise-learning
source: https://quantum.cloud.ibm.com/docs/en/api/qiskit-noise-learning/generated/models-rate-space
---

# qiskit\_noise\_learning.models.RateSpace

*class* `qiskit_noise_learning.models.RateSpace(generators: dict[str, QubitSparsePauliList])`

[GitHub](https://github.com/Qiskit/qiskit-noise-learning/tree/stable/0.1/qiskit_noise_learning/models/pauli_lindblad_model.py)

Bases: [`IndexedSpace`](/docs/api/qiskit-noise-learning/generated/math-indexed-space "qiskit_noise_learning.math.indexed_space.IndexedSpace")\[[`GeneratorIndex`](/docs/api/qiskit-noise-learning/generated/models-generator-index "qiskit_noise_learning.models.pauli_lindblad_model.GeneratorIndex")]

Space of Pauli-Lindblad generator rates, indexed by [`GeneratorIndex`](/docs/api/qiskit-noise-learning/generated/models-generator-index "qiskit_noise_learning.models.GeneratorIndex").

**Parameters**

**generators** – A dictionary mapping gate name to the gate’s Pauli-Lindblad generators.

### \_\_init\_\_

`__init__(generators: dict[str, QubitSparsePauliList])`

## Methods

|                                                                                                                              |   |
| ---------------------------------------------------------------------------------------------------------------------------- | - |
| [`__init__`](#qiskit_noise_learning.models.RateSpace.__init__ "qiskit_noise_learning.models.RateSpace.__init__")(generators) |   |

## Attributes

|                                                                                                                        |                                              |
| ---------------------------------------------------------------------------------------------------------------------- | -------------------------------------------- |
| [`dim`](#qiskit_noise_learning.models.RateSpace.dim "qiskit_noise_learning.models.RateSpace.dim")                      | The dimension (cardinality) of the space.    |
| [`generators`](#qiskit_noise_learning.models.RateSpace.generators "qiskit_noise_learning.models.RateSpace.generators") | The Pauli-Lindblad generators for each gate. |

### generators

Type: [`dict`](https://docs.python.org/3/library/stdtypes.html#dict)\[[`str`](https://docs.python.org/3/library/stdtypes.html#str), [`QubitSparsePauliList`](/docs/api/qiskit/qiskit.quantum_info.QubitSparsePauliList)]

The Pauli-Lindblad generators for each gate.

### dim

Type: [`int`](https://docs.python.org/3/library/functions.html#int) | [`float`](https://docs.python.org/3/library/functions.html#float)

The dimension (cardinality) of the space.

May be `math.inf` for infinite-dimensional spaces.