[CQT-441] Make the cycle time a modifiable parameter for the quantify scheduler exporter

CHANGELOG.md

@@ -10,6 +10,13 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 * **Fixed** for any bug fixes.
 * **Removed** for now removed features.
 
+## [ M.m.P ] - [ YYYY-MM-DD ]
+
+### Added
+
+- The cycle time [seconds] can be set when instantiating the `QuantifySchedulerExporter` through the `cycle_time`
+parameter. 
+
 ## [ 0.9.0 ] - [ 2025-12-19 ]
 
 ### Added

opensquirrel/passes/exporter/quantify_scheduler_exporter.py

@@ -37,8 +37,11 @@
 
 
 class QuantifySchedulerExporter(Exporter):
-    def __init__(self, operation_cycles: OperationCycles | None = None, **kwargs: Any) -> None:
+    def __init__(
+        self, cycle_time: float = CYCLE_TIME, operation_cycles: OperationCycles | None = None, **kwargs: Any
+    ) -> None:
         super().__init__(**kwargs)
+        self._cycle_time = cycle_time
         self._operation_cycles = operation_cycles
 
     def export(self, circuit: Circuit) -> quantify_scheduler.Schedule:
@@ -54,7 +57,7 @@ def export(self, circuit: Circuit) -> quantify_scheduler.Schedule:
             # Obtain ALAP reference timing for schedulables
             schedulables = list(schedule_creator.schedule.schedulables.values())
             if schedulables:
-                scheduler = _Scheduler(circuit.register_manager, schedulables, self._operation_cycles)
+                scheduler = _Scheduler(circuit.register_manager, schedulables, self._cycle_time, self._operation_cycles)
                 circuit.ir.reverse().accept(scheduler)
 
                 # Update timing constraints of schedulables
@@ -79,9 +82,11 @@ def __init__(
         self,
         qubit_register_size: int,
         schedulables: list[Schedulable],
+        cycle_time: float,
         operation_cycles: OperationCycles | None,
     ) -> None:
         self._schedulables = schedulables
+        self._cycle_time = cycle_time
         self._operation_cycles = operation_cycles
         self._cycles: list[int] = [0] * qubit_register_size
         self._ref_index: list[int] = list(range(qubit_register_size))
@@ -106,7 +111,7 @@ def set_schedulable_timing_constraints(self, qubit_indices: list[int]) -> None:
 
         operation_cycles = self._get_operation_cycles(schedulable) if ref_schedulable else 0
         cycle = self._cycles[pertinent_qubit_index] + operation_cycles
-        waiting_time = -1.0 * ((cycle - operation_cycles) - ref_cycle) * CYCLE_TIME
+        waiting_time = -1.0 * ((cycle - operation_cycles) - ref_cycle) * self._cycle_time
         self._set_timing_constraints(schedulable, ref_schedulable, waiting_time)
 
         self._set_reference(qubit_indices, schedulable, cycle)
@@ -174,11 +179,11 @@ def __init__(
         self,
         register_manager: RegisterManager,
         schedulables: list[Schedulable],
+        cycle_time: float,
         operation_cycles: OperationCycles | None,
     ) -> None:
         self._qubit_register_size = register_manager.qubit_register_size
-        self._operation_cycles = operation_cycles
-        self._operation_record = OperationRecord(self._qubit_register_size, schedulables, operation_cycles)
+        self._operation_record = OperationRecord(self._qubit_register_size, schedulables, cycle_time, operation_cycles)
 
     @property
     def operation_record(self) -> OperationRecord:

tests/passes/exporter/test_quantify_scheduler_exporter.py

@@ -431,6 +431,18 @@ def test_operation_timing(
         _check_waiting_cycles(exported_schedule, expected_waiting_cycles)
 
 
+def test_cycle_time(qs_is_installed: bool) -> None:
+    if qs_is_installed:
+        cycle_time = 10e-9
+        wait_cycles = 5
+        expected_relative_time = -1.0 * wait_cycles * cycle_time
+        circuit = Circuit.from_string(f"""version 3; qubit q; X q; wait({wait_cycles}) q; X q""")
+        exported_schedule = circuit.export(exporter=QuantifySchedulerExporter(cycle_time=cycle_time))
+        rel_time = next(iter(exported_schedule.schedulables.values()))["timing_constraints"][0].rel_time
+        assert cycle_time != CYCLE_TIME
+        assert rel_time == expected_relative_time
+
+
 @pytest.fixture
 def mock_qs() -> Generator[MagicMock, None, None]:
     mock_qs = MagicMock()