Add first QC experiments.

Bell states in the Microsoft Quantum SDK and Rigetti's pyQuil.

qc/quil/bell/bell.py

@@ -0,0 +1,35 @@
+#!/usr/bin/env python3
+# bell.py tries to run the same Bell state program demonstrating simple
+# entanglement of qubits.
+from pyquil.quil import Program
+from pyquil.api import QVMConnection
+from pyquil.gates import CNOT, H
+
+def main():
+    qvm = QVMConnection()
+
+    print('Constructing program.')
+    p = Program()
+    p.inst(H(0)).inst(CNOT(0, 1)).measure(0, 0).measure(1, 1)
+    print('Constructed program:')
+    print('--------------------')
+    print(p)
+    print('--------------------')
+
+    print('\nRunning program on simulator.')
+    results = qvm.run(p, trials=1000)
+    
+    stats = {0: 0, 1: 0, 'agreement': 0}
+    for result in results:
+        if result[0] == 0:
+            stats[0] += 1
+        if result[0] == 1:
+            stats[1] += 1
+        if result[0] == result[1]:
+            stats['agreement'] += 1
+
+    print('Results: |0>: {:d} |1>: {:d} agree: {:d}'.format(
+        stats[0], stats[1], stats['agreement']))
+            
+if __name__ == '__main__':
+    main()