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Update the norm check for QubitStateVector in default.qubit (v0.19.1) #1924

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Nov 22, 2021
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Update the norm check for QubitStateVector in default.qubit (v0.19.1) #1924

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e13d304
norm check fix
antalszava Nov 22, 2021
9804362
0.19.1 changelog
antalszava Nov 22, 2021
b0d2cc7
0.19.1 bump
antalszava Nov 22, 2021
4706d5b
pr number
antalszava Nov 22, 2021
cbd808c
changelog for 0.19.1 in the release notes
antalszava Nov 22, 2021
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2 changes: 2 additions & 0 deletions doc/development/release_notes.md
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Expand Up @@ -4,6 +4,8 @@ Release notes
This page contains the release notes for PennyLane.


.. mdinclude:: ../releases/changelog-0.19.1.md

.. mdinclude:: ../releases/changelog-0.19.0.md

.. mdinclude:: ../releases/changelog-0.18.0.md
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2 changes: 1 addition & 1 deletion doc/releases/changelog-0.19.0.md
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@@ -1,6 +1,6 @@
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# Release 0.19.0 (current release)
# Release 0.19.0

<h3>New features since last release</h3>

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16 changes: 16 additions & 0 deletions doc/releases/changelog-0.19.1.md
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@@ -0,0 +1,16 @@
:orphan:
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don't forget to also add this file to release_notes.md!

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Thanks for the catch!


# Release 0.19.1 (current release)

<h3>Bug fixes</h3>

* Fixes a bug where using JAX's jit function on certain QNodes that contain
the `qml.QubitStateVector` operation raised an error with earlier JAX
versions (e.g., `jax==0.2.10` and `jaxlib==0.1.64`).
[(#1924)](https://github.com/PennyLaneAI/pennylane/pull/1924)

<h3>Contributors</h3>

This release contains contributions from (in alphabetical order):

Josh Izaac, Romain Moyard, Antal Száva.
2 changes: 1 addition & 1 deletion pennylane/_version.py
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Expand Up @@ -16,4 +16,4 @@
Version number (major.minor.patch[-label])
"""

__version__ = "0.19.0"
__version__ = "0.19.1"
5 changes: 3 additions & 2 deletions pennylane/devices/default_qubit.py
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Expand Up @@ -633,8 +633,9 @@ def _apply_state_vector(self, state, device_wires):
if len(qml.math.shape(state)) != 1 or n_state_vector != 2 ** len(device_wires):
raise ValueError("State vector must be of length 2**wires.")

if not qml.math.is_abstract(state):
if not qml.math.allclose(qml.math.linalg.norm(state, ord=2), 1.0, atol=tolerance):
norm = qml.math.linalg.norm(state, ord=2)
if not qml.math.is_abstract(norm):
if not qml.math.allclose(norm, 1.0, atol=tolerance):
raise ValueError("Sum of amplitudes-squared does not equal one.")

if len(device_wires) == self.num_wires and sorted(device_wires) == device_wires:
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