Figure 6
Schematic teleportation of arbitrary n-photon system with two DoFs.
The quantum channel is constructed by hyperentanglements 
, j = 1, ..., n. Xp = |0〉 〈1| + |1〉 〈0| and Xs = |r1〉 〈r2| + |r2〉 〈r1| denote Pauli flips on the polarization DoF and spatial DoF {r1, r2} of one photon, respectively. CNOT1 = |0〉 〈0| ⊗ I2 + |1〉 〈1| ⊗ Xp and CNOT2 = |d0〉 〈d0| ⊗ I2 + |d1〉 〈d1| ⊗ Xs are preformed on the photon Aj and the input photon j. PS, BS and H-plate are defined in the Fig. 1. DH and DV are single photon detectors. The feed-forward operations of Bob are only single photon operations.
