added comment to Fermionic Operator
@@ -148,6 +148,14 @@ class FermionicOperator(object):
"""
Jordan_Wigner mode.
+ Each Fermionic Operator is mapped to 2 Pauli Operators, added together with the appropriate phase. I.E.:
+
+ a_i^\\dagger = Z^i (X + iY) I^(n-i-1) = (Z^i X I^(n-i-1)) + i (Z^i Y I^(n-i-1))
+ a_i = Z^i (X - iY) I^(n-i-1)
+
+ This is implemented by creating an array of tuples, each including two operators, X and Y. The phase between two elements in a tuple is implicitly assumed, and added calculated at the appropriate time (see for example _one_body_mapping).
+
+
Args:
n (int): number of modes
"""
