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Experimental demonstration of complete quantum information masking and generalization of quantum secret sharing
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Experimental demonstration of complete quantum information masking and generalization of quantum secret sharing
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Journal Article
Experimental demonstration of complete quantum information masking and generalization of quantum secret sharing
2025
Overview
Quantum information masking (QIM) allows encoding quantum information in multipartite systems. Complete QIM is of great significance in quantum foundation and application. However, the realization of complete QIM, even for single-qubit encoded information, is still lacking. Here, we propose to demonstrate complete QIM with 4-qubit entangled states. The proposed QIM can be readily extended to multipartite systems with arbitrary number of subsystems, enabling quantum secret sharing (QSS) and quantum teleportation between multiplayers. In experiment, we build up a 4-qubit hyperentangled state to implement complete QIM. The trace distance of 16 encoded single-qubit states falls within the range of 0.12 ± 0.02 to 0.03 ± 0.02. Furthermore, we implement QSS between six players by expanding the 4-qubit state to a 6-qubit state entangled in hybrid manner, in which we observe an average fidelity 0.85 ± 0.03 of the recovered states. Our results open the door towards QIM-enabled quantum information processing and provide applications in quantum communications.
Quantum information masking allows encoding quantum information in multipartite systems, which is hidden from subsystems and can be recovered from the nonlocal correlation. The authors propose and realize the complete quantum information masking and apply it to quantum secret sharing between six players.
