Create circuit.py

circuit.py

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+import numpy as np
+from qiskit import QuantumCircuit, QuantumRegister, ClassicalRegister
+from qiskit.circuit.library import RealAmplitudes, MSGate  
+
+# Create quantum and classical registers
+qr = QuantumRegister(3)
+cr = ClassicalRegister(3)
+qc = QuantumCircuit(qr, cr)
+
+# Apply Ry rotations with pi/2 phase on all qubits
+for i in range(3):
+    qc.ry(np.pi/2, i)
+
+# Add RealAmplitudes ansatz
+ansatz = RealAmplitudes(num_qubits=3, entanglement='linear', reps=2, insert_barriers=True)
+qc.compose(ansatz, inplace=True)
+
+# Incorporate Molmer-Sorensen gate
+qc.append(MSGate(num_qubits=3, theta=np.pi/4), [0, 1, 2])
+
+# Add reversed ansatz for decoding
+reversed_ansatz = ansatz.inverse()
+qc.compose(reversed_ansatz, inplace=True)
+
+# Apply Rx rotations with pi/2 phase on all qubits
+for i in range(3):
+    qc.rx(np.pi/2, i)
+
+# Measure all qubits
+qc.measure(qr, cr)
+
+# Visualize the final circuit
+qc.draw()