Update the LQ new device API to work with Catalyst

pennylane_lightning/core/_version.py

@@ -16,4 +16,4 @@
    Version number (major.minor.patch[-label])
 """
 
-__version__ = "0.36.0-dev20"
+__version__ = "0.36.0-dev21"

pennylane_lightning/lightning_kokkos/lightning_kokkos.toml

@@ -18,6 +18,7 @@ observables = [
         "SProd",
         "Prod",
         "Exp",
+        "LinearCombination",
 ]
 
 # The union of all gate types listed in this section must match what

pennylane_lightning/lightning_qubit/lightning_qubit.py

@@ -358,7 +358,9 @@
     _CPP_BINARY_AVAILABLE = LQ_CPP_BINARY_AVAILABLE
     _new_API = True
     _backend_info = backend_info if LQ_CPP_BINARY_AVAILABLE else None
-    _config = Path(__file__).parent / "lightning_qubit.toml"
+
+    # This `config` is used in Catalyst-Frontend
+    config = Path(__file__).parent / "lightning_qubit.toml"
 
     # TODO: Move supported ops/obs to TOML file
     operations = _operations
@@ -413,7 +415,7 @@
             self._num_burnin = num_burnin
         else:
             self._kernel_name = None
-            self._num_burnin = None
+            self._num_burnin = 0
 
     @property
     def name(self):
@@ -465,7 +467,7 @@
         * Currently does not intrinsically support parameter broadcasting
 
         """
-        config = self._setup_execution_config(execution_config)
+        exec_config = self._setup_execution_config(execution_config)
         program = TransformProgram()
 
         program.add_transform(validate_measurements, name=self.name)
@@ -475,9 +477,9 @@
         program.add_transform(decompose, stopping_condition=stopping_condition, name=self.name)
         program.add_transform(qml.transforms.broadcast_expand)
 
-        if config.gradient_method == "adjoint":
+        if exec_config.gradient_method == "adjoint":
             _add_adjoint_transforms(program)
-        return program, config
+        return program, exec_config
 
     # pylint: disable=unused-argument
     def execute(

pennylane_lightning/lightning_qubit/lightning_qubit.toml

@@ -19,6 +19,7 @@ observables = [
         "SProd",
         "Prod",
         "Exp",
+        "LinearCombination",
 ]
 
 # The union of all gate types listed in this section must match what
@@ -92,6 +93,8 @@ matrix = [
         "QubitSum",
         "DiagonalQubitUnitary",
         "BlockEncode",
+        "MidMeasureMP",
+        "Conditional",
 ]
 
 [measurement_processes]