Merge branch 'master' into deprecate-qinfo

doc/development/deprecations.rst

@@ -14,6 +14,12 @@ Pending deprecations
   - Deprecated in v0.39
   - Will be removed in v0.40
 
+* `QNode.gradient_fn` is deprecated. Please use `QNode.diff_method` instead. `QNode.get_gradient_fn` can also be used to
+  process the diff method.
+
+  - Deprecated in v0.39
+  - Will be removed in v0.40
+
 * All of the legacy devices (any with the name ``default.qubit.{autograd,torch,tf,jax,legacy}``) are deprecated. Use ``default.qubit`` instead,
   as it supports backpropagation for the many backends the legacy devices support.
 

doc/development/guide/logging.rst

@@ -298,7 +298,7 @@ process, and surrounding operations:
 
    # Get logger for use by this script only.
    logger = logging.getLogger(__name__)
-   dev_name = "default.qubit.jax"
+   dev_name = "default.qubit"
    num_wires = 2
    num_shots = None
 

doc/development/release_notes.md

@@ -5,6 +5,8 @@ This page contains the release notes for PennyLane.
 
 .. mdinclude:: ../releases/changelog-dev.md
 
+.. mdinclude:: ../releases/changelog-0.38.1.md
+
 .. mdinclude:: ../releases/changelog-0.38.0.md
 
 .. mdinclude:: ../releases/changelog-0.37.0.md

doc/introduction/interfaces/jax.rst

@@ -54,7 +54,7 @@ a JAX-capable QNode in PennyLane. Simply specify the ``interface='jax'`` keyword
 
 .. code-block:: python
 
-    dev = qml.device('default.qubit.jax', wires=2)
+    dev = qml.device('default.qubit', wires=2)
 
     @qml.qnode(dev, interface='jax')
     def circuit1(phi, theta):
@@ -85,7 +85,7 @@ For example:
 
 .. code-block:: python
 
-    dev = qml.device('default.qubit.jax', wires=2)
+    dev = qml.device('default.qubit', wires=2)
 
     @qml.qnode(dev, interface='jax')
     def circuit3(phi, theta):
@@ -119,7 +119,7 @@ the ``@jax.jit`` decorator can be directly applied to the QNode.
 
 .. code-block:: python
 
-    dev = qml.device('default.qubit.jax', wires=2)
+    dev = qml.device('default.qubit', wires=2)
 
     @jax.jit  # QNode calls will now be jitted, and should run faster.
     @qml.qnode(dev, interface='jax')
@@ -176,7 +176,7 @@ Example:
 
         # Device construction should happen inside a `jax.jit` decorated
         # method when using a PRNGKey.
-        dev = qml.device('default.qubit.jax', wires=2, prng_key=key, shots=100)
+        dev = qml.device('default.qubit', wires=2, prng_key=key, shots=100)
 
 
         @qml.qnode(dev, interface='jax', diff_method=None)

doc/releases/changelog-0.38.0.md

@@ -1,6 +1,6 @@
 :orphan:
 
-# Release 0.38.0 (current release)
+# Release 0.38.0
 
 <h3>New features since last release</h3>
 

doc/releases/changelog-0.38.1.md

@@ -0,0 +1,14 @@
+:orphan:
+
+# Release 0.38.1 (current release)
+
+<h3>Bug fixes 🐛</h3>
+
+* Fix float-to-complex casting in various places across PennyLane.
+ [(#6260)](https://github.com/PennyLaneAI/pennylane/pull/6260)
+
+<h3>Contributors ✍️</h3>
+
+This release contains contributions from (in alphabetical order):
+
+Mudit Pandey

doc/releases/changelog-dev.md

@@ -63,9 +63,10 @@
 * Remove support for Python 3.9.
   [(#6223)](https://github.com/PennyLaneAI/pennylane/pull/6223)
 
-* `DefaultQubitTF` and `DefaultQubitTorch` are removed. Please use `default.qubit` for all interfaces.
+* `DefaultQubitTF`, `DefaultQubitTorch`, and `DefaultQubitJax` are removed. Please use `default.qubit` for all interfaces.
   [(#6207)](https://github.com/PennyLaneAI/pennylane/pull/6207)
   [(#6208)](https://github.com/PennyLaneAI/pennylane/pull/6208)
+  [(#6209)](https://github.com/PennyLaneAI/pennylane/pull/6209)
 
 * `expand_fn`, `max_expansion`, `override_shots`, and `device_batch_transform` are removed from the
   signature of `qml.execute`.
@@ -89,6 +90,9 @@
 * The `qml.qinfo` module has been deprecated.
   [(#5911)](https://github.com/PennyLaneAI/pennylane/pull/5911)
 
+* `QNode.gradient_fn` is deprecated. Please use `QNode.diff_method` and `QNode.get_gradient_fn` instead.
+  [(#6244)](https://github.com/PennyLaneAI/pennylane/pull/6244)
+
 <h3>Documentation 📝</h3>
 
 <h3>Bug fixes 🐛</h3>
@@ -108,6 +112,9 @@
 * The ``qml.Qubitization`` template now orders the ``control`` wires first and the ``hamiltonian`` wires second, which is the expected according to other templates.
   [(#6229)](https://github.com/PennyLaneAI/pennylane/pull/6229)
 
+* The ``qml.FABLE`` template now returns the correct value when JIT is enabled.
+  [(#6263)](https://github.com/PennyLaneAI/pennylane/pull/6263)
+
 * <h3>Contributors ✍️</h3>
 
 This release contains contributions from (in alphabetical order):

pennylane/_version.py

@@ -16,4 +16,4 @@
 Version number (major.minor.patch[-label])
 """
 
-__version__ = "0.39.0-dev12"
+__version__ = "0.39.0-dev14"

pennylane/devices/__init__.py

@@ -27,7 +27,6 @@
 
     default_qubit
     default_qubit_legacy
-    default_qubit_jax
     default_qubit_autograd
     default_gaussian
     default_mixed

pennylane/devices/_qubit_device.py

@@ -1110,7 +1110,11 @@ def classical_shadow(self, obs, circuit):
         n_snapshots = self.shots
         seed = obs.seed
 
-        with qml.workflow.set_shots(self, shots=1):
+        original_shots = self.shots
+        original_shot_vector = self._shot_vector
+
+        try:
+            self.shots = 1
             # slow implementation but works for all devices
             n_qubits = len(wires)
             mapped_wires = np.array(self.map_wires(wires))
@@ -1139,6 +1143,10 @@ def classical_shadow(self, obs, circuit):
                 )
 
                 outcomes[t] = self.generate_samples()[0][mapped_wires]
+        finally:
+            self.shots = original_shots
+            # pylint: disable=attribute-defined-outside-init
+            self._shot_vector = original_shot_vector
 
         return self._cast(self._stack([outcomes, recipes]), dtype=np.int8)