From 5f63a19532e3f358fa86a603dc63ffbf9a155e38 Mon Sep 17 00:00:00 2001
From: Daniel Tsvetkov <danieltcv@gmail.com>
Date: Wed, 4 Dec 2019 17:38:48 +0100
Subject: [PATCH] superdense with cirq

---
 02_cirq.py | 24 +++++++++++++++++++-----
 1 file changed, 19 insertions(+), 5 deletions(-)

diff --git a/02_cirq.py b/02_cirq.py
index d8f1754..c57fabe 100644
--- a/02_cirq.py
+++ b/02_cirq.py
@@ -1,13 +1,26 @@
 import cirq
 
-def main():
+
+def superdense():
     # Pick a qubit.
-    qubit = cirq.GridQubit(0, 0)
+    q1 = cirq.GridQubit(0, 0)
+    q2 = cirq.GridQubit(1, 0)
 
     # Create a circuit
     circuit = cirq.Circuit.from_ops(
-        cirq.X(qubit)**0.5,  # Square root of NOT.
-        cirq.measure(qubit, key='m')  # Measurement.
+        cirq.H(q1),
+        cirq.CNOT(q1, q2),  # Alice prepares the Bell state,
+        # #################### Alice sends q2 to Bob,
+        # Uncomment below lines depending on what you want to send
+        # cirq.I(q1),  # Alice wants to send 00 with superdense coding
+        # cirq.X(q1),  # Alice wants to send 01 with superdense coding
+        cirq.Z(q1),  # Alice wants to send 10 with superdense coding
+        # cirq.X(q1), cirq.Z(q1),  # Alice wants to send 11 with superdense coding
+        # ################# Some time later...
+        cirq.CNOT(q1, q2),
+        cirq.H(q1),  # Bob reverses the encoding
+        cirq.measure(q1, key='q1'),  # Measurement.
+        cirq.measure(q2, key='q2')  # Measurement.
     )
     print("Circuit:")
     print(circuit)
@@ -18,5 +31,6 @@ def main():
     print("Results:")
     print(result)
 
+
 if __name__ == "__main__":
-    main()
\ No newline at end of file
+    superdense()