Enable use of qiskit ParameterExpressions for circuit conversion: qiskit to braket

qiskit_braket_provider/providers/adapter.py

@@ -10,6 +10,7 @@
     gates,
     observables,
 )
+from braket.parametric.free_parameter_expression import FreeParameterExpression
 from braket.device_schema import (
     DeviceActionType,
     GateModelQpuParadigmProperties,
@@ -26,10 +27,11 @@
 from braket.devices import LocalSimulator
 
 from numpy import pi
+from sympy import sympify
 
 from qiskit import QuantumCircuit, transpile
 from qiskit.circuit import Instruction as QiskitInstruction
-from qiskit.circuit import Measure, Parameter
+from qiskit.circuit import Measure, Parameter, ParameterExpression
 from qiskit.circuit.library import (
     CCXGate,
     CPhaseGate,
@@ -450,8 +452,12 @@ def convert_qiskit_to_braket_circuit(circuit: QuantumCircuit) -> Circuit:
 
             for i, param in enumerate(params):
                 if isinstance(param, Parameter):
-                    params[i] = FreeParameter(param.name)
-
+                    cleaned_param_name = str(param._symbol_expr).replace('[', '').replace(']', '')
+                    params[i] = FreeParameter(cleaned_param_name)
+                elif isinstance(param, ParameterExpression):
+                    cleaned_expr_str = str(param._symbol_expr).replace('[', '').replace(']', '')
+                    params[i] = FreeParameterExpression(sympify(cleaned_expr_str))
+
             for gate in qiskit_gate_names_to_braket_gates[gate_name](*params):
                 instruction = Instruction(
                     # Getting the index from the bit mapping