# {py:mod}`qcheff.iswt.iswt`

```{py:module} qcheff.iswt.iswt
```

```{autodoc2-docstring} qcheff.iswt.iswt
:allowtitles:
```

## Module Contents

### Classes

````{list-table}
:class: autosummary longtable
:align: left

* - {py:obj}`ExactIterativeSWT <qcheff.iswt.iswt.ExactIterativeSWT>`
  - ```{autodoc2-docstring} qcheff.iswt.iswt.ExactIterativeSWT
    :summary:
    ```
* - {py:obj}`NPADScipySparse <qcheff.iswt.iswt.NPADScipySparse>`
  - ```{autodoc2-docstring} qcheff.iswt.iswt.NPADScipySparse
    :summary:
    ```
* - {py:obj}`NPADCupySparse <qcheff.iswt.iswt.NPADCupySparse>`
  - ```{autodoc2-docstring} qcheff.iswt.iswt.NPADCupySparse
    :summary:
    ```
````

### API

`````{py:class} ExactIterativeSWT
:canonical: qcheff.iswt.iswt.ExactIterativeSWT

```{autodoc2-docstring} qcheff.iswt.iswt.ExactIterativeSWT
```

````{py:attribute} H
:canonical: qcheff.iswt.iswt.ExactIterativeSWT.H
:type: qcheff.operators.OperatorMatrix
:value: >
   None

```{autodoc2-docstring} qcheff.iswt.iswt.ExactIterativeSWT.H
```

````

````{py:attribute} givens_sparse_backend_
:canonical: qcheff.iswt.iswt.ExactIterativeSWT.givens_sparse_backend_
:type: types.ModuleType | None
:value: >
   None

```{autodoc2-docstring} qcheff.iswt.iswt.ExactIterativeSWT.givens_sparse_backend_
```

````

````{py:attribute} copy
:canonical: qcheff.iswt.iswt.ExactIterativeSWT.copy
:type: dataclasses.InitVar[bool]
:value: >
   'field(...)'

```{autodoc2-docstring} qcheff.iswt.iswt.ExactIterativeSWT.copy
```

````

````{py:method} givens_rotation_matrix(i: int, j: int) -> qcheff.operators.qcheff_sparse_array
:canonical: qcheff.iswt.iswt.ExactIterativeSWT.givens_rotation_matrix
:abstractmethod:

```{autodoc2-docstring} qcheff.iswt.iswt.ExactIterativeSWT.givens_rotation_matrix
```

````

````{py:method} unitary_transformation(U: qcheff.operators.qcheff_array) -> None
:canonical: qcheff.iswt.iswt.ExactIterativeSWT.unitary_transformation

```{autodoc2-docstring} qcheff.iswt.iswt.ExactIterativeSWT.unitary_transformation
```

````

````{py:method} eliminate_couplings(couplings: qcheff.operators.qcheff_dense_array) -> None
:canonical: qcheff.iswt.iswt.ExactIterativeSWT.eliminate_couplings

```{autodoc2-docstring} qcheff.iswt.iswt.ExactIterativeSWT.eliminate_couplings
```

````

````{py:method} eliminate_coupling(i: int, j: int) -> None
:canonical: qcheff.iswt.iswt.ExactIterativeSWT.eliminate_coupling

```{autodoc2-docstring} qcheff.iswt.iswt.ExactIterativeSWT.eliminate_coupling
```

````

````{py:method} largest_couplings(n: int = 1)
:canonical: qcheff.iswt.iswt.ExactIterativeSWT.largest_couplings

```{autodoc2-docstring} qcheff.iswt.iswt.ExactIterativeSWT.largest_couplings
```

````

`````

`````{py:class} NPADScipySparse
:canonical: qcheff.iswt.iswt.NPADScipySparse

Bases: {py:obj}`qcheff.iswt.iswt.ExactIterativeSWT`

```{autodoc2-docstring} qcheff.iswt.iswt.NPADScipySparse
```

````{py:method} givens_rotation_matrix(i: int, j: int) -> qcheff.operators.qcheff_sparse_array
:canonical: qcheff.iswt.iswt.NPADScipySparse.givens_rotation_matrix

```{autodoc2-docstring} qcheff.iswt.iswt.NPADScipySparse.givens_rotation_matrix
```

````

````{py:method} largest_couplings(n: int = 1, levels=None)
:canonical: qcheff.iswt.iswt.NPADScipySparse.largest_couplings

```{autodoc2-docstring} qcheff.iswt.iswt.NPADScipySparse.largest_couplings
```

````

`````

`````{py:class} NPADCupySparse
:canonical: qcheff.iswt.iswt.NPADCupySparse

Bases: {py:obj}`qcheff.iswt.iswt.ExactIterativeSWT`

```{autodoc2-docstring} qcheff.iswt.iswt.NPADCupySparse
```

````{py:method} givens_rotation_matrix(i: int, j: int) -> qcheff.operators.qcheff_sparse_array
:canonical: qcheff.iswt.iswt.NPADCupySparse.givens_rotation_matrix

```{autodoc2-docstring} qcheff.iswt.iswt.NPADCupySparse.givens_rotation_matrix
```

````

````{py:method} largest_couplings(n: int = 1, levels=None)
:canonical: qcheff.iswt.iswt.NPADCupySparse.largest_couplings

```{autodoc2-docstring} qcheff.iswt.iswt.NPADCupySparse.largest_couplings
```

````

`````