Prepare 0.17.2 release (#6354)

* Prepare 0.17.2 release

This commit prepares for the 0.17.2 release by bumping the version
strings to reflect the new version and updating the release notes.
This is just a bugfix release that fixes bugs since the 0.17.1
release.

* Update release notes

docs/conf.py

@@ -44,7 +44,7 @@
 # The short X.Y version
 version = ''
 # The full version, including alpha/beta/rc tags
-release = '0.17.1'
+release = '0.17.2'
 
 # -- General configuration ---------------------------------------------------
 

qiskit/VERSION.txt

@@ -1 +1 @@
-0.17.1
+0.17.2

releasenotes/notes/bugfix-skip-target-basis-translation-12a9fa02c9ceef25.yaml

@@ -1,5 +1,8 @@
 ---
 fixes:
   - |
-    Fixed an issue with :class:`~qiskit.transpiler.passes.BasisTranslator` where in some
-    cases it would translate gates already in the target basis.
+    Fixed an issue with the :class:`~qiskit.transpiler.passes.BasisTranslator`
+    transpiler pass which in some cases would translate gates already in the
+    target basis. This would potentially result in both longer execution time
+    and less optimal results.
+    Fixed `#6085 <https://github.com/Qiskit/qiskit-terra/issues/6085>`__

releasenotes/notes/bugfix-spsa-callback-24f7200814f16895.yaml

@@ -1,6 +1,6 @@
 ---
 fixes:
   - |
-    Fixed an issue in :class:`~qiskit.algorithms.optimisers.SPSA` where 
-    providing a callback function caused an error. Also updated callback
-    function parameter documentation to match code.
+    Fixed an issue in the :class:`~qiskit.algorithms.optimisers.SPSA` when
+    the optimizer was initialized with a callback function via the ``callback``
+    kwarg would potentially cause an error to be raised.

releasenotes/notes/fix-expval-pauli-qargs-183843993ca83f71.yaml

@@ -1,8 +1,10 @@
 ---
 fixes:
   - |
-    Fixes bug in :meth:`qiskit.quantum_info.Statevector.expectation_value`
-    and :meth:`qiskit.quantum_info.DensityMatrix.expectation_value` where
-    the ``qargs`` kwarg was ignored if the operator was a
+    Fixed an issue in the
+    :meth:`qiskit.quantum_info.Statevector.expectation_value`
+    and :meth:`qiskit.quantum_info.DensityMatrix.expectation_value`methods
+    where the ``qargs`` kwarg was ignored if the operator was a
     :class:`~qiskit.quantum_info.Pauli` or
-    :class:`~qiskit.quantum_info.SparsePauliOp` operator.
+    :class:`~qiskit.quantum_info.SparsePauliOp` operator object.
+    Fixed `#6303 <https://github.com/Qiskit/qiskit-terra/issues/6303>`__

releasenotes/notes/fix-pauli-evolve-c6653853962885cd.yaml

@@ -1,5 +1,8 @@
 ---
 fixes:
   - |
-    Fixes a bug in :meth:`qiskit.quantum_info.Pauli.evolve` which could
-    result in the incorrect Pauli when evolving by a CZ, CY, or Swap gate.
+    Fixed an issue in the :meth:`qiskit.quantum_info.Pauli.evolve` method
+    which could have resulted in the incorrect Pauli being returned when
+    evolving by a :class:`~qiskit.circuit.library.CZGate`,
+    :class:`~qiskit.circuit.library.CYGate`, or a
+    :class:`~qiskit.circuit.library.SwapGate` gate.

releasenotes/notes/fix-sparse-statefn-equality-and-to-dict-96d1a1ae98bcdb52.yaml

@@ -1,8 +1,10 @@
 ---
 fixes:
   - |
-    Fix the :meth:`qiskit.opflow.SparseVectorStateFn.to_dict_fn` method, which
-    previously had at most one entry for the all zero state due to an index error.
+    Fixed an issue in the :meth:`qiskit.opflow.SparseVectorStateFn.to_dict_fn`
+    method, which previously had at most one entry for the all zero state due
+    to an index error.
   - |
-    Fix the :meth:`qiskit.opflow.SparseVectorStateFn.equals` method to return 
-    `True` or `False` instead of a sparse vector comparison of the single elements.
+    Fixed an issue in the :meth:`qiskit.opflow.SparseVectorStateFn.equals`
+    method so that is properly returning ``True`` or ``False`` instead of a
+    sparse vector comparison of the single elements.

releasenotes/notes/fix-state-probabilities-qargs-f5f2a29dc07e69cd.yaml

@@ -1,11 +1,12 @@
 ---
 fixes:
   - |
-    Fixes a bug in :class:`~qiskit.quantum_info.Statevector` and
+    Fixes an issue in the :class:`~qiskit.quantum_info.Statevector` and
     :class:`~qiskit.quantum_info.DensityMatrix` probability methods
-    :meth:`~qiskit.quantum_info.Statevector.probabilities`,
-    :meth:`~qiskit.quantum_info.Statevector.probabilities_dict`,
-    :meth:`~qiskit.quantum_info.DensityMatrix.probabilities`,
-    :meth:`~qiskit.quantum_info.DensityMatrix.probabilities_dict`
+    :meth:`qiskit.quantum_info.Statevector.probabilities`,
+    :meth:`qiskit.quantum_info.Statevector.probabilities_dict`,
+    :meth:`qiskit.quantum_info.DensityMatrix.probabilities`,
+    :meth:`qiskit.quantum_info.DensityMatrix.probabilities_dict`
     where the returned probabilities could have incorrect ordering
     for certain values of the ``qargs`` kwarg.
+    Fixed `#6320 <https://github.com/Qiskit/qiskit-terra/issues/6320>`__

releasenotes/notes/fix-tapered-pauli-with-params-6df0fcfe4197feac.yaml

@@ -1,7 +1,10 @@
 ---
 fixes:
   - |
-    Fixes the bug where :class:`~qiskit.opflow.TaperedPauliSumOp`
-    did not support the multiplication by
-    :class:`~qiskit.circuit.ParameterExpression` and
-    :meth:`~qiskit.opflow.TaperedPauliSumOp.assign_parameters`.
+    Fixed an issue where the :class:`~qiskit.opflow.TaperedPauliSumOp` class
+    did not support the multiplication with
+    :class:`~qiskit.circuit.ParameterExpression` object and also did not have
+    a necessary :meth:`~qiskit.opflow.TaperedPauliSumOp.assign_parameters`
+    method for working with :class:`~qiskit.circuit.ParameterExpression`
+    objects.
+    Fixed `#6127 <https://github.com/Qiskit/qiskit-terra/issues/6127>`__

releasenotes/notes/prep-0.17.2-20da26503826bf27.yaml

@@ -0,0 +1,15 @@
+---
+prelude: >
+    This is a bugfix release that fixes several issues from the 0.17.1 release.
+    Most importantly this release fixes compatibility for the
+    :class:`~qiskit.utils.QuantumInstance` class when running on backends
+    that are based on the :class:`~qiskit.providers.BackendV1` abstract class.
+    This fixes all the algorithms and applications built on
+    :mod:`qiskit.algorithms` or :mod:`qiskit.opflow` when running on newer
+    backends.
+fixes:
+  - |
+    Fixed compatibility for the :class:`~qiskit.utils.QuantumInstance` class
+    when running on backends that are based on the
+    :class:`~qiskit.providers.BackendV1` abstract class.
+    Fixed `#6280 <https://github.com/Qiskit/qiskit-terra/issues/6280>`__

setup.py

@@ -69,7 +69,7 @@
 
 setup(
     name="qiskit-terra",
-    version="0.17.1",
+    version="0.17.2",
     description="Software for developing quantum computing programs",
     long_description=README,
     long_description_content_type='text/markdown',