Fig. 1: The complete QIM process in the 4-qubit system. | Communications Physics

Fig. 1: The complete QIM process in the 4-qubit system.

From: Experimental demonstration of complete quantum information masking and generalization of quantum secret sharing

Fig. 1

The two steps of QIM and unmasking can compose the process of quantum teleportation. For the QIM scheme, the initial state which is encoded in the polarization and represented by the green and blue spheres will pass through the two CNOT gates C21 and C1A and the initial state will be completely masked in the 4-qubit hyperentangled state. The protocol of unmasking will transmit the initial state to an arbitrary qubit and finish quantum teleportation. The photon pair (photon-2, photon-3) is prepared in the Bell state of \(\frac{1}{\sqrt{2}}{(\left\vert HH\right\rangle +\left\vert VV\right\rangle )}_{23}\).

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