superdense coding

Author: mrtkp9993

README.md

@@ -39,3 +39,9 @@ Scheme for `n=2`:
 Scheme for `n=3`:
 
 ![Quantum Fourier Transform](./circuit_diagrams/05_qft.png)
+
+### Superdense Coding
+
+> Task. Transmit two bits of classical information between Alice and Bob using only one qubit.
+
+![Superdense Coding](./circuit_diagrams/e1_superdense_coding.png)

circuit_diagrams/e1_superdense_coding.png

@@ -0,0 +1,46 @@
+'''
+    Superdense Coding
+
+    Task. Transmit two bits of classical information between 
+    Alice and Bob using only one qubit.
+
+'''
+from qiskit import IBMQ, BasicAer
+from qiskit import QuantumCircuit, ClassicalRegister, QuantumRegister, execute
+
+qr = QuantumRegister(2)  # Initialize qubits
+cr = ClassicalRegister(2)  # Initialize bits for record measurements
+circuit = QuantumCircuit(qr, cr)
+
+# Create Bell state - Alice and Bob share an entagle qubit pair
+circuit.h(qr[0])
+circuit.cx(qr[0], qr[1])
+
+circuit.barrier()
+
+# Apply Quantum operations
+# I x I -> Alice will get 00
+# X x I -> Alice will get 01
+# Z x I -> Alice will get 10
+# (XZ) x I -> Alice will get 11
+circuit.x(qr[0])
+circuit.z(qr[0])
+
+circuit.barrier()
+
+# Apply Hadamard to qubit 0 - Take qubit 0 out of superposition
+circuit.cx(qr[0], qr[1])
+circuit.h(qr[0])
+
+circuit.barrier()
+
+# Measurement
+circuit.measure(qr, cr)
+
+# Run our circuit with local simulator
+backend = BasicAer.get_backend('qasm_simulator')
+shots = 1024
+results = execute(circuit, backend=backend, shots=shots).result()
+answer = results.get_counts()
+print(answer)
+# Measurement is 11