Quantum ToolkitOperatorsXXOn this pageXX XX(integer site0, integer site1) -> SpinHalfOperator Returns a spin-1/2 OperatorNamed for Xi⋅XjX_i \cdot X_jXi⋅Xj operator, taking two individual site indices. Parameters site0: The first site index (iii). site1: The second site index (jjj). Example var pxx1 = XX(1, 2)