Add qutip-cuquantum example

.github/workflows/nightly_ci.yaml

@@ -17,8 +17,10 @@ jobs:
         include:
           - qutip-version: '4'
             qutip-branch: 'qutip-4.7.X'
+            qip-branch: 'qutip-qip-0.4.X'
           - qutip-version: '5'
             qutip-branch: 'master'
+            qip-branch: 'master'
 
     - name: Setup Conda
       uses: conda-incubator/setup-miniconda@v3
@@ -54,7 +56,7 @@ jobs:
         pip install -r requirements.txt
         pip install .
         cd ..
-        python -m pip install git+https://github.com/qutip/qutip-qip
+        python -m pip install git+https://github.com/qutip/qutip-qip@${{ matrix.qip-branch }}
         python -m pip install --no-deps git+https://github.com/qutip/qutip-jax
         python -m pip install --no-deps git+https://github.com/qutip/qutip-qoc
 
@@ -81,6 +83,11 @@ jobs:
         find . -name '*.md' -exec jupytext --to notebook {} +
         find . -name '*.md' -delete
 
+    - name: Remove cuQuantum notebook from tests
+      # Without GPU, this notebook can't be ran.
+      if:  ${{ matrix.qutip-version == '5' }}
+      run: rm notebooks/miscellaneous/cuQuantum_backend.ipynb
+
     - name: Check PEP8 formatting
       run: |
         pip install nbqa flake8
@@ -93,6 +100,12 @@ jobs:
         find . -name '*.ipynb' -exec pytest --nbmake --overwrite --nbmake-timeout=900 {} +
         rm template.ipynb
 
+    - name: Copy cuQuantum notebook
+      # Without GPU, this notebook can't be ran.
+      # Copy the already executed notebook after the tests.
+      if:  ${{ matrix.qutip-version == '5' }}
+      run: cp tutorials-v5/miscellaneous/cuQuantum_backend.ipynb notebooks/miscellaneous/
+
     - name: Create Notebook Artifact
       uses: actions/upload-artifact@v4
       with:

.github/workflows/notebook_ci.yaml

@@ -86,6 +86,11 @@ jobs:
         find . -name '*.md' -exec jupytext --to notebook {} +
         find . -name '*.md' -delete
 
+    - name: Remove cuQuantum notebook from tests
+      # Without GPU, this notebook can't be ran.
+      if:  ${{ matrix.qutip-version == '5' }}
+      run: rm notebooks/miscellaneous/cuQuantum_backend.ipynb
+
     - name: Check PEP8 formatting
       run: |
         pip install nbqa flake8
@@ -98,6 +103,12 @@ jobs:
         find . -name '*.ipynb' -exec pytest --nbmake --overwrite --nbmake-timeout=900 {} +
         rm template.ipynb
 
+    - name: Copy cuQuantum notebook
+      # Without GPU, this notebook can't be ran.
+      # Copy the already executed notebook after the tests.
+      if:  ${{ matrix.qutip-version == '5' }}
+      run: cp tutorials-v5/miscellaneous/cuQuantum_backend.ipynb notebooks/miscellaneous/
+
     - name: Create Notebook Artifact
       uses: actions/upload-artifact@v4
       with: