Add a new argument concurrent_measurements to target class (#10258)

* fix measure_v2

* modify measure_all

* dispatch backend

* add test of the builder with backendV2

* reconfigure test codes and some func

* refactoring

* add reno

* fix _measure_v2

* fix backend.meas_map in measure_v2

* fix reno

* delete get_qubit_channels from utils

* add get_qubits_channels in qubit_channels

* recostruct test about the builder with backendV2

* add meas_map to Target class

* fix after mergin main branch

* fix documents about meas_map

* format target.py

* add reno

* add meas_map to target in convert_to_target

* add the more description about meas_map

* Update releasenotes/notes/enable_target_aware_meas_map-0d8542402a74e9d8.yaml

Co-authored-by: Naoki Kanazawa <nkanazawa1989@gmail.com>

* fix test_meas_map

* remove format_meas_map

* rename meas_map in target to concurrent_measuments

* change reno

* remove Unused Union Dict

* concurrent_measurements set as getattr(configuration, meas_map)

* Update qiskit/transpiler/target.py

Co-authored-by: Naoki Kanazawa <nkanazawa1989@gmail.com>

* Update qiskit/transpiler/target.py

Co-authored-by: Naoki Kanazawa <nkanazawa1989@gmail.com>

* format

---------

Co-authored-by: Naoki Kanazawa <nkanazawa1989@gmail.com>

qiskit/providers/backend_compat.py

@@ -70,7 +70,11 @@ def convert_to_target(
         if filter_faulty:
             faulty_qubits = set(properties.faulty_qubits())
         qubit_properties = qubit_props_list_from_props(properties=properties)
-        target = Target(num_qubits=configuration.n_qubits, qubit_properties=qubit_properties)
+        target = Target(
+            num_qubits=configuration.n_qubits,
+            qubit_properties=qubit_properties,
+            concurrent_measurements=getattr(configuration, "meas_map", None),
+        )
         # Parse instructions
         gates: Dict[str, Any] = {}
         for gate in properties.gates:
@@ -122,7 +126,10 @@ def convert_to_target(
         target.add_instruction(Measure(), measure_props)
     # Parse from configuration because properties doesn't exist
     else:
-        target = Target(num_qubits=configuration.n_qubits)
+        target = Target(
+            num_qubits=configuration.n_qubits,
+            concurrent_measurements=getattr(configuration, "meas_map", None),
+        )
         for gate in configuration.gates:
             name = gate.name
             gate_props = (

qiskit/providers/fake_provider/utils/backend_converter.py

@@ -43,7 +43,7 @@ def convert_to_target(conf_dict: dict, props_dict: dict = None, defs_dict: dict
     qubit_props = None
     if props_dict:
         qubit_props = qubit_props_from_props(props_dict)
-    target = Target(qubit_properties=qubit_props)
+    target = Target(qubit_properties=qubit_props, concurrent_measurements=conf_dict.get("meas_map"))
     # Parse from properties if it exsits
     if props_dict is not None:
         # Parse instructions

qiskit/transpiler/target.py

@@ -21,7 +21,7 @@ from __future__ import annotations
 
 import itertools
 
-from typing import Any
+from typing import Optional, List, Any
 from collections.abc import Mapping
 from collections import defaultdict
 import datetime
@@ -239,6 +239,7 @@ class Target(Mapping):
         "_non_global_strict_basis",
         "qubit_properties",
         "_global_operations",
+        "concurrent_measurements",
     )
 
     @deprecate_arg("aquire_alignment", new_alias="acquire_alignment", since="0.23.0")
@@ -252,6 +253,7 @@ class Target(Mapping):
         pulse_alignment=1,
         acquire_alignment=1,
         qubit_properties=None,
+        concurrent_measurements=None,
     ):
         """
         Create a new Target object
@@ -287,7 +289,9 @@ class Target(Mapping):
                 matches the qubit number the properties are defined for. If some
                 qubits don't have properties available you can set that entry to
                 ``None``
-        Raises:
+            concurrent_measurements(list): A list of sets of qubits that must be
+                measured together. This must be provided
+                as a nested list like [[0, 1], [2, 3, 4]].
             ValueError: If both ``num_qubits`` and ``qubit_properties`` are both
             defined and the value of ``num_qubits`` differs from the length of
             ``qubit_properties``.
@@ -322,6 +326,7 @@ class Target(Mapping):
                         "length of the input qubit_properties list"
                     )
         self.qubit_properties = qubit_properties
+        self.concurrent_measurements = concurrent_measurements
 
     def add_instruction(self, instruction, properties=None, name=None):
         """Add a new instruction to the :class:`~qiskit.transpiler.Target`
@@ -1215,6 +1220,7 @@ class Target(Mapping):
         inst_map: InstructionScheduleMap | None = None,
         backend_properties: BackendProperties | None = None,
         instruction_durations: InstructionDurations | None = None,
+        concurrent_measurements: Optional[List[List[int]]] = None,
         dt: float | None = None,
         timing_constraints: TimingConstraints | None = None,
         custom_name_mapping: dict[str, Any] | None = None,
@@ -1263,6 +1269,9 @@ class Target(Mapping):
             instruction_durations: Optional instruction durations for instructions. If specified
                 it will take priority for setting the ``duration`` field in the
                 :class:`~InstructionProperties` objects for the instructions in the target.
+            concurrent_measurements(list): A list of sets of qubits that must be
+                measured together. This must be provided
+                as a nested list like [[0, 1], [2, 3, 4]].
             dt: The system time resolution of input signals in seconds
             timing_constraints: Optional timing constraints to include in the
                 :class:`~.Target`
@@ -1306,6 +1315,7 @@ class Target(Mapping):
             pulse_alignment=pulse_alignment,
             acquire_alignment=acquire_alignment,
             qubit_properties=qubit_properties,
+            concurrent_measurements=concurrent_measurements,
         )
         name_mapping = get_standard_gate_name_mapping()
         if custom_name_mapping is not None:

releasenotes/notes/enable_target_aware_meas_map-0d8542402a74e9d8.yaml

@@ -0,0 +1,16 @@
+---
+features:
+  - |
+    Added :attr:`~.Target.concurrent_measurements` which represents a hardware constraint of qubits
+    measured concurrently. This constraint is provided in the nested list form,
+    in which each element represents qubit group to be measured together. 
+    In an example below,
+    
+    .. code-block:: python
+    
+        [[0, 1], [2, 3, 4]]
+     
+    qubits 0 and 1, and 2, 3 and 4 are measured together on the device.
+    This constraint doesn't block measuring an individual qubit,
+    however, Qiskit scheduler must consider the alignment of 
+    measure operations for those qubits.    

test/python/transpiler/test_target.py

@@ -1903,6 +1903,15 @@ class TestTargetFromConfiguration(QiskitTestCase):
         self.assertEqual(target.pulse_alignment, constraints.pulse_alignment)
         self.assertEqual(target.acquire_alignment, constraints.acquire_alignment)
 
+    def test_concurrent_measurements(self):
+        fake_backend = FakeVigo()
+        config = fake_backend.configuration()
+        target = Target.from_configuration(
+            basis_gates=config.basis_gates,
+            concurrent_measurements=config.meas_map,
+        )
+        self.assertEqual(target.concurrent_measurements, config.meas_map)
+
     def test_custom_basis_gates(self):
         basis_gates = ["my_x", "cx"]
         custom_name_mapping = {"my_x": XGate()}