Removing the quimb backend from lightning.tensor (#737)

* Removed interface * Auto update version from '0.37.0-dev14' to '0.37.0-dev15' * Removing `quimb` from requirements * Auto update version from '0.37.0-dev15' to '0.37.0-dev16' * Auto update version from '0.37.0-dev16' to '0.37.0-dev17' * moving TODO string in a more elegant place * Auto update version from '0.37.0-dev17' to '0.37.0-dev18' * debugging new failure on the CI --------- Co-authored-by: ringo-but-quantum <[email protected]>
PennyLaneAI · May 24, 2024 · 7b0858a · 7b0858a
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diff --git a/.github/CHANGELOG.md b/.github/CHANGELOG.md
@@ -7,6 +7,9 @@
 
 ### Breaking changes
 
+* Removed the `QuimbMPS` class and the corresponding interface/backend from `lightning.tensor`.
+  [(#737)](https://github.com/PennyLaneAI/pennylane-lightning/pull/737)
+
 * Changed the name of `default.tensor` to `lightning.tensor` with the `quimb` backend.
   [(#730)](https://github.com/PennyLaneAI/pennylane-lightning/pull/730)
 

diff --git a/.github/workflows/tests_lkcpu_python.yml b/.github/workflows/tests_lkcpu_python.yml
@@ -246,7 +246,7 @@ jobs:
           python -m pip install pytest-xdist
           cd main/
           DEVICENAME=`echo ${{ matrix.pl_backend }} | sed "s/_/./g"`
-            PL_DEVICE=${DEVICENAME} python -m pytest tests/ $COVERAGE_FLAGS --splits 7 --group ${{ matrix.group }} \
+            PL_DEVICE=${DEVICENAME} python -m pytest tests/ --exitfirst $COVERAGE_FLAGS --splits 7 --group ${{ matrix.group }} \
               --store-durations --durations-path='.github/workflows/python_lightning_kokkos_test_durations.json' --splitting-algorithm=least_duration
             mv .github/workflows/python_lightning_kokkos_test_durations.json ${{ github.workspace }}/.test_durations-${{ matrix.exec_model }}-${{ matrix.group }}
           pl-device-test --device ${DEVICENAME} --skip-ops --shots=20000 $COVERAGE_FLAGS --cov-append

diff --git a/pennylane_lightning/core/_version.py b/pennylane_lightning/core/_version.py
@@ -16,4 +16,4 @@
    Version number (major.minor.patch[-label])
 """
 
-__version__ = "0.37.0-dev17"
+__version__ = "0.37.0-dev18"
diff --git a/pennylane_lightning/lightning_tensor/backends/quimb/_mps.py b/pennylane_lightning/lightning_tensor/backends/quimb/_mps.py