code: def fermi_fourier_trans_2(p, q):
      
  
      yield cirq.Z(p)**1.5
      yield cirq.ISWAP(q, p)**0.5
      yield cirq.Z(p)**1.5
docs: The 2-mode fermionic Fourier transformation can be implemented
      straightforwardly by the √iSWAP gate. The √iSWAP gate can be readily
      implemented with the gmon qubits using the XX + YY Hamiltonian. The matrix
      representation of the 2-qubit fermionic Fourier transformation is:
      [1  0      0      0],
      [0  1/√2   1/√2   0],
      [0  1/√2  -1/√2   0],
      [0  0      0     -1]
      The square root of the iSWAP gate is:
      [1, 0, 0, 0],
      [0, 0.5 + 0.5j, 0.5 - 0.5j, 0],
      [0, 0.5 - 0.5j, 0.5 + 0.5j, 0],
      [0, 0, 0, 1]
  
      Args:
          p: the first qubit
          q: the second qubit