Syncing master with V0.36.0 branch

.github/CHANGELOG.md

@@ -1,4 +1,22 @@
-# Release 0.36.0-dev
+# Release 0.37.0-dev
+
+### New features since last release
+
+### Breaking changes
+
+### Improvements
+
+### Documentation
+
+### Bug fixes
+
+### Contributors
+
+This release contains contributions from (in alphabetical order):
+
+---
+
+# Release 0.36.0
 
 ### New features since last release
 
@@ -11,7 +29,7 @@
 * `lightning.kokkos` supports mid-circuit measurements.
   [(#672)](https://github.com/PennyLaneAI/pennylane-lightning/pull/672)
 
-* Add dynamic linking to LAPACK/OpenBlas shared objects in scipy.libs for both C++ and Python layer.
+* Add dynamic linking to LAPACK/OpenBlas shared objects in `scipy.libs` for both C++ and Python layer.
   [(#653)](https://github.com/PennyLaneAI/pennylane-lightning/pull/653)
 
 * `lightning.qubit` supports mid-circuit measurements.
@@ -29,7 +47,7 @@
 * Add analytic-mode `qml.probs` and `qml.var` support in `lightning.qubit2`.
   [(#627)](https://github.com/PennyLaneAI/pennylane-lightning/pull/627)
 
-* Add LightningAdjointJacobian to support `lightning.qubit2`.
+* Add `LightningAdjointJacobian` to support `lightning.qubit2`.
   [(#631)](https://github.com/PennyLaneAI/pennylane-lightning/pull/631)
 
 * Add `lightning.qubit2` device which uses the new device API.
@@ -44,6 +62,12 @@
 
 ### Breaking changes
 
+* Split Lightning-Qubit and Lightning-Kokkos CPU Python tests with `pytest-split`. Remove `SERIAL` from Kokkos' `exec_model` matrix. Remove `all` from Lightning-Kokkos' `pl_backend` matrix. Move `clang-tidy` checks to `tidy.yml`. Avoid editable `pip` installations.
+  [(#696)](https://github.com/PennyLaneAI/pennylane-lightning/pull/696)
+
+* Update `lightning.gpu` and `lightning.kokkos` to raise an error instead of falling back to `default.qubit`.
+  [(#689)](https://github.com/PennyLaneAI/pennylane-lightning/pull/689)
+
 * Add `paths` directives to test workflows to avoid running tests that cannot be impacted by changes.
   [(#699)](https://github.com/PennyLaneAI/pennylane-lightning/pull/699)
   [(#695)](https://github.com/PennyLaneAI/pennylane-lightning/pull/695)
@@ -65,7 +89,7 @@
 
 ### Improvements
 
-* Add tests for Windows Wheels, fix ill-defined caching, and set the proper backend for LKokkos wheels.
+* Add tests for Windows Wheels, fix ill-defined caching, and set the proper backend for `lightning.kokkos` wheels.
   [(#693)](https://github.com/PennyLaneAI/pennylane-lightning/pull/693)
 
 * Replace string comparisons by `isinstance` checks where possible.
@@ -105,17 +129,20 @@
 
 ### Bug fixes
 
+* Fix wire order permutations when using `qml.probs` with out-of-order wires.
+  [(#707)](https://github.com/PennyLaneAI/pennylane-lightning/pull/707)
+
 * Lightning Qubit once again respects the wire order specified on device instantiation.
   [(#705)](https://github.com/PennyLaneAI/pennylane-lightning/pull/705)
 
 * `dynamic_one_shot` was refactored to use `SampleMP` measurements as a way to return the mid-circuit measurement samples. `LightningQubit`'s `simulate` is modified accordingly.
-  [(#694)](https://github.com/PennyLaneAI/pennylane/pull/694)
+  [(#694)](https://github.com/PennyLaneAI/pennylane-lightning/pull/694)
 
 * `LightningQubit` correctly decomposes state prep operations when used in the middle of a circuit.
-  [(#687)](https://github.com/PennyLaneAI/pennylane/pull/687)
+  [(#687)](https://github.com/PennyLaneAI/pennylane-lightning/pull/687)
 
 * `LightningQubit` correctly decomposes `qml.QFT` and `qml.GroverOperator` if `len(wires)` is greater than 9 and 12 respectively.
-  [(#687)](https://github.com/PennyLaneAI/pennylane/pull/687)
+  [(#687)](https://github.com/PennyLaneAI/pennylane-lightning/pull/687)
 
 * Specify `isort` `--py` (Python version) and `-l` (max line length) to stabilize `isort` across Python versions and environments.
   [(#647)](https://github.com/PennyLaneAI/pennylane-lightning/pull/647)
@@ -135,14 +162,11 @@
 * Update the version of `codecov-action` to v4 and fix the CodeCov issue with the PL-Lightning check-compatibility actions.
   [(#682)](https://github.com/PennyLaneAI/pennylane-lightning/pull/682)
 
-* Increase tolerance for a flaky test.
-  [(#703)](https://github.com/PennyLaneAI/pennylane-lightning/pull/703)
-
 ### Contributors
 
 This release contains contributions from (in alphabetical order):
 
-Ali Asadi, Amintor Dusko, Pietropaolo Frisoni, Christina Lee, Vincent Michaud-Rioux, Lee James O'Riordan, Mudit Pandey, Shuli Shu
+Ali Asadi, Amintor Dusko, Christina Lee, Vincent Michaud-Rioux, Lee James O'Riordan, Mudit Pandey, Shuli Shu
 
 ---
 

.github/workflows/build_and_cache_Kokkos_linux.yml

@@ -33,7 +33,7 @@ jobs:
     steps:
       - name: Kokkos execution strategy
         id: exec_model
-        run: echo "exec_model=[\"SERIAL\", \"OPENMP\"]" >> $GITHUB_OUTPUT
+        run: echo "exec_model=[\"OPENMP\"]" >> $GITHUB_OUTPUT
 
       - name: Kokkos version
         id: kokkos_version

.github/workflows/compat-check-latest-latest.yml

@@ -20,9 +20,16 @@ jobs:
       lightning-version: latest
       pennylane-version: latest
     secrets: inherit
-  tests_linux_python:
-    name: Lightning Compatibility test (tests_linux_python) - latest/latest
-    uses: ./.github/workflows/tests_linux_python.yml
+  tests_lqcpu_python:
+    name: Lightning Compatibility test (tests_lqcpu_python) - latest/latest
+    uses: ./.github/workflows/tests_lqcpu_python.yml
+    with:
+      lightning-version: latest
+      pennylane-version: latest
+    secrets: inherit
+  tests_lkcpu_python:
+    name: Lightning Compatibility test (tests_lkcpu_python) - latest/latest
+    uses: ./.github/workflows/tests_lkcpu_python.yml
     with:
       lightning-version: latest
       pennylane-version: latest

.github/workflows/compat-check-latest-stable.yml

@@ -20,9 +20,16 @@ jobs:
       lightning-version: latest
       pennylane-version: stable
     secrets: inherit
-  tests_linux_python:
-    name: Lightning Compatibility test (tests_linux_python) - latest/stable
-    uses: ./.github/workflows/tests_linux_python.yml
+  tests_lqcpu_python:
+    name: Lightning Compatibility test (tests_lqcpu_python) - latest/stable
+    uses: ./.github/workflows/tests_lqcpu_python.yml
+    with:
+      lightning-version: latest
+      pennylane-version: stable
+    secrets: inherit
+  tests_lkcpu_python:
+    name: Lightning Compatibility test (tests_lkcpu_python) - latest/stable
+    uses: ./.github/workflows/tests_lkcpu_python.yml
     with:
       lightning-version: latest
       pennylane-version: stable

.github/workflows/compat-check-release-release.yml

@@ -20,9 +20,16 @@ jobs:
       lightning-version: release
       pennylane-version: release
     secrets: inherit
-  tests_linux_python:
-    name: Lightning Compatibility test (tests_linux_python) - release/release
-    uses: ./.github/workflows/tests_linux_python.yml
+  tests_lqcpu_python:
+    name: Lightning Compatibility test (tests_lqcpu_python) - release/release
+    uses: ./.github/workflows/tests_lqcpu_python.yml
+    with:
+      lightning-version: release
+      pennylane-version: release
+    secrets: inherit
+  tests_lkcpu_python:
+    name: Lightning Compatibility test (tests_lkcpu_python) - release/release
+    uses: ./.github/workflows/tests_lkcpu_python.yml
     with:
       lightning-version: release
       pennylane-version: release

.github/workflows/compat-check-stable-latest.yml

@@ -20,9 +20,16 @@ jobs:
       lightning-version: stable
       pennylane-version: latest
     secrets: inherit
-  tests_linux_python:
-    name: Lightning Compatibility test (tests_linux_python) - stable/latest
-    uses: ./.github/workflows/tests_linux_python.yml
+  tests_lqcpu_python:
+    name: Lightning Compatibility test (tests_lqcpu_python) - stable/latest
+    uses: ./.github/workflows/tests_lqcpu_python.yml
+    with:
+      lightning-version: stable
+      pennylane-version: latest
+    secrets: inherit
+  tests_lkcpu_python:
+    name: Lightning Compatibility test (tests_lkcpu_python) - stable/latest
+    uses: ./.github/workflows/tests_lkcpu_python.yml
     with:
       lightning-version: stable
       pennylane-version: latest

.github/workflows/compat-check-stable-stable.yml

@@ -20,9 +20,16 @@ jobs:
       lightning-version: stable
       pennylane-version: stable
     secrets: inherit
-  tests_linux_python:
-    name: Lightning Compatibility test (tests_linux_python) - stable/stable
-    uses: ./.github/workflows/tests_linux_python.yml
+  tests_lqcpu_python:
+    name: Lightning Compatibility test (tests_lqcpu_python) - stable/stable
+    uses: ./.github/workflows/tests_lqcpu_python.yml
+    with:
+      lightning-version: stable
+      pennylane-version: stable
+    secrets: inherit
+  tests_lkcpu_python:
+    name: Lightning Compatibility test (tests_lkcpu_python) - stable/stable
+    uses: ./.github/workflows/tests_lkcpu_python.yml
     with:
       lightning-version: stable
       pennylane-version: stable

.github/workflows/dev_version_script.py

@@ -95,18 +95,22 @@ def update_prerelease_version(repo_root_path: Path, version: Version):
     #  - A prerelease, has `X.Y.Z-prerelease` in _version.py
     #  - The prerelease startswith `dev`. We do not want to auto bump for non-dev prerelease.
     if pr_version.prerelease and pr_version.prerelease.startswith(DEV_PRERELEASE_TAG_PREFIX):
-        # If master branch does not have a prerelease (for any reason) OR does not have an ending number
-        # Then default to the starting tag
-        if not master_version.prerelease or master_version.prerelease == DEV_PRERELEASE_TAG_PREFIX:
-            next_prerelease_version = DEV_PRERELEASE_TAG_START
+        # If this is the first prerelease PR, do nothing!
+        if pr_version.prerelease == DEV_PRERELEASE_TAG_START:
+            print("PR is dev0 prerelease ... Nothing to do!")
         else:
-            # Generate the next prerelease version (eg: dev1 -> dev2). Sourcing from master version.
-            next_prerelease_version = master_version.next_version("prerelease").prerelease
-        new_version = master_version.replace(prerelease=next_prerelease_version)
-        if pr_version != new_version:
-            print(f"Updating PR package version from -> '{pr_version}', to -> {new_version}")
-            update_prerelease_version(args.pr, new_version)
-        else:
-            print(f"PR is on the expected version '{new_version}' ... Nothing to do!")
+            # If master branch does not have a prerelease (for any reason) OR does not have an ending number
+            # Then default to the starting tag
+            if not master_version.prerelease or master_version.prerelease == DEV_PRERELEASE_TAG_PREFIX:
+                next_prerelease_version = DEV_PRERELEASE_TAG_START
+            else:
+                # Generate the next prerelease version (eg: dev1 -> dev2). Sourcing from master version.
+                next_prerelease_version = master_version.next_version("prerelease").prerelease
+            new_version = master_version.replace(prerelease=next_prerelease_version)
+            if pr_version != new_version:
+                print(f"Updating PR package version from -> '{pr_version}', to -> {new_version}")
+                update_prerelease_version(args.pr, new_version)
+            else:
+                print(f"PR is on the expected version '{new_version}' ... Nothing to do!")
     else:
         print("PR is not a dev prerelease ... Nothing to do!")

.github/workflows/format.yml

@@ -10,7 +10,7 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  black:
+  format-python:
     name: Format (Python)
     runs-on: ubuntu-22.04
     steps:
@@ -42,38 +42,3 @@ jobs:
 
       - name: Run formatter
         run: PATH=$PATH:/home/ubuntu/.local/bin/:$(dirname $(which python3))/ ./bin/format --check ./pennylane_lightning/core/src
-
-  tidy-cpp:
-    strategy:
-      matrix:
-        os: [ubuntu-22.04]
-        pl_backend: ["lightning_qubit"]
-
-    name: Tidy (C++)
-    runs-on: ${{ matrix.os }}
-
-    steps:
-      - name: Checkout PennyLane-Lightning
-        uses: actions/checkout@v4
-
-      - name: Set up Python
-        uses: actions/setup-python@v5
-        with:
-          python-version: '3.11'
-
-      - name: Install dependencies
-        run: sudo apt update && sudo apt -y install cmake gcc-11 g++-11 ninja-build libomp-14-dev && python -m pip install -r requirements-dev.txt
-        env:
-          DEBIAN_FRONTEND: noninteractive
-
-      - name: Run clang-tidy compilation
-        run: |
-          cmake -BBuild -G Ninja . \
-            -DENABLE_CLANG_TIDY=ON \
-            -DCLANG_TIDY_BINARY=$(dirname $(which python))/clang-tidy \
-            -DBUILD_TESTS=ON \
-            -DENABLE_WARNINGS=ON \
-            -DPL_BACKEND=${{ matrix.pl_backend }} \
-            -DCMAKE_CXX_COMPILER="$(which g++-11)" \
-            -DCMAKE_C_COMPILER="$(which gcc-11)"
-          cmake --build ./Build