Prepare 0.16.2 release

docs/conf.py

@@ -44,7 +44,7 @@
 # The short X.Y version
 version = ''
 # The full version, including alpha/beta/rc tags
-release = '0.16.1'
+release = '0.16.2'
 
 # -- General configuration ---------------------------------------------------
 

qiskit/VERSION.txt

@@ -1 +1 @@
-0.16.1
+0.16.2

qiskit/dagcircuit/dagcircuit.py

@@ -1422,7 +1422,7 @@ def collect_runs(self, namelist):
 
     # pylint: disable=too-many-boolean-expressions
 
-    def collect_1q_runs(self):
+    def _collect_1q_runs(self):
         """Return a set of non-conditional runs of 1q "op" nodes."""
         group_list = []
         # Iterate through the nodes of self in topological order

qiskit/transpiler/passes/optimization/optimize_1q_decomposition.py

@@ -68,7 +68,7 @@ def run(self, dag):
         if not self.basis:
             LOG.info("Skipping pass because no basis is set")
             return dag
-        runs = dag.collect_1q_runs()
+        runs = dag._collect_1q_runs()
         for run in runs:
             # Don't try to optimize a single 1q gate
             if len(run) <= 1:

releasenotes/notes/bugfix-assemble-delay-32a96b59bb84badd.yaml

@@ -1,9 +1,14 @@
 ---
 fixes:
   - |
-    Pulse :py:class:`~qiskit.pulse.instructions.Delay` is now explicitly
-    assembled as qobj instructions.
+    Pulse :py:class:`~qiskit.pulse.instructions.Delay` instructions are now
+    explicitly assembled as :class:`~qiskit.qobj.PulseQobjInstruction` objects
+    included in the :class:`~qiskit.qobj.PulseQobj` output from
+    :func:`~qiskit.compiler.assemble`.
 
-    Previously, we could ignore delays rather than assembling them. Now, with
-    pulse gates, there are times that we want to schedule ONLY a delay, and not
-    including the delay itself would remove the delay.
+    Previously, we could ignore :py:class:`~qiskit.pulse.instructions.Delay`
+    instructions in a :class:`~qiskit.pulse.Schedule` as part of
+    :func:`~qiskit.compiler.assemble` as the time was explicit in the
+    :class:`~qiskit.qobj.PulseQobj` objects. But, now with pulse gates, there
+    are situations where we can schedule ONLY a delay, and not including the
+    delay itself would remove the delay.

releasenotes/notes/fix-global-phase-upon-repeat-f742f4c0201fea97.yaml

@@ -1,8 +1,12 @@
 ---
 fixes:
   - |
-    Fix the global phase of the output of ``circuit.repeat``. If a circuit with global
-    phase is appended to another circuit, the global phase is currently not propagated.
-    The simulators rely on this, since the phase otherwise gets applied multiple times.
-    This sets the global phase of ``circuit.repeat`` to 0 instead of multiplying the existing
-    phase times the number of repetitions.
+    Fix the global phase of the output of the
+    :class:`~qiskit.circuit.QuantumCircuit` method
+    :meth:`~qiskit.circuit.QuantumCircuit.repeat`. If a circuit with global
+    phase is appended to another circuit, the global phase is currently not
+    propagated. Simulators rely on this, since the phase otherwise gets
+    applied multiple times. This sets the global phase of
+    :meth:`~qiskit.circuit.QuantumCircuit.repeat` to 0 before appending the
+    repeated circuit instead of multiplying the existing phase times the
+    number of repetitions.

releasenotes/notes/fix_hellinger_fidelity_def-7f60d53e3577fdaf.yaml

@@ -2,5 +2,6 @@
 fixes:
   - |
     The definition of the Hellinger fidelity from has been corrected from the
-    previous defition of :math`1-H(P,Q)` to :math:`[1-H(P,Q)**2]**2` so that it
-    is equal to the quantum state fidelity of P, Q as diagonal density matrices.
+    previous defition of :math:`1-H(P,Q)` to :math:`[1-H(P,Q)^2]^2` so that it
+    is equal to the quantum state fidelity of P, Q as diagonal density
+    matrices.

releasenotes/notes/transpile_singleton-61755c5cf1970111.yaml

@@ -4,7 +4,7 @@ fixes:
     When running :func:`qiskit.compiler.transpile` on a list of circuits with a
     single element, the function used to return a circuit instead of a list. Now,
     when :func:`qiskit.compiler.transpile` is called with a list, it will return a
-    list if when that list has a single element. See
+    list even if that list has a single element. See
     `#5260 <https://github.com/Qiskit/qiskit-terra/issues/5260>`__.
 
     .. code-block:: python
@@ -20,4 +20,4 @@ fixes:
       print(type(transpiled), len(transpiled))
 
     .. parsed-literal::
-     <class 'list'> 1
+     <class 'list'> 1

setup.py

@@ -77,7 +77,7 @@
 
 setup(
     name="qiskit-terra",
-    version="0.16.1",
+    version="0.16.2",
     description="Software for developing quantum computing programs",
     long_description=README,
     long_description_content_type='text/markdown',

test/python/dagcircuit/test_dagcircuit.py

@@ -718,7 +718,7 @@ def test_dag_collect_1q_runs(self):
         self.dag.apply_operation_back(CXGate(), [self.qubit2, self.qubit1])
         self.dag.apply_operation_back(CXGate(), [self.qubit1, self.qubit2])
         self.dag.apply_operation_back(HGate(), [self.qubit2])
-        collected_runs = self.dag.collect_1q_runs()
+        collected_runs = self.dag._collect_1q_runs()
         self.assertEqual(len(collected_runs), 2)
         for run in collected_runs:
             if run[0].name == 'h':
@@ -742,7 +742,7 @@ def test_dag_collect_1q_runs_start_with_conditional(self):
             h_gate, [self.qubit0])
         self.dag.apply_operation_back(HGate(), [self.qubit0])
         self.dag.apply_operation_back(HGate(), [self.qubit0])
-        collected_runs = self.dag.collect_1q_runs()
+        collected_runs = self.dag._collect_1q_runs()
         self.assertEqual(len(collected_runs), 1)
         run = collected_runs.pop()
         self.assertEqual(len(run), 2)
@@ -758,7 +758,7 @@ def test_dag_collect_1q_runs_conditional_in_middle(self):
         self.dag.apply_operation_back(
             h_gate, [self.qubit0])
         self.dag.apply_operation_back(HGate(), [self.qubit0])
-        collected_runs = self.dag.collect_1q_runs()
+        collected_runs = self.dag._collect_1q_runs()
         # Should return 2 single h gate runs (1 before condition, 1 after)
         self.assertEqual(len(collected_runs), 2)
         for run in collected_runs:
@@ -774,7 +774,7 @@ def test_dag_collect_1q_runs_with_parameterized_gate(self):
         self.dag.apply_operation_back(U1Gate(theta), [self.qubit0])
         self.dag.apply_operation_back(XGate(), [self.qubit0])
         self.dag.apply_operation_back(XGate(), [self.qubit0])
-        collected_runs = self.dag.collect_1q_runs()
+        collected_runs = self.dag._collect_1q_runs()
         self.assertEqual(len(collected_runs), 2)
         run_gates = [[x.name for x in run] for run in collected_runs]
         self.assertIn(['h', 'h'], run_gates)
@@ -794,7 +794,7 @@ def test_dag_collect_1q_runs_with_cx_in_middle(self):
         self.dag.apply_operation_back(YGate(), [self.qubit0])
         self.dag.apply_operation_back(XGate(), [self.qubit1])
         self.dag.apply_operation_back(XGate(), [self.qubit1])
-        collected_runs = self.dag.collect_1q_runs()
+        collected_runs = self.dag._collect_1q_runs()
         self.assertEqual(len(collected_runs), 4)
         for run in collected_runs:
             if run[0].name == 'h':