Quantum secret sharing protocol with four state Grover algorithm and its proof-of-principle experimental demonstration

In this article, we propose a three-party quantum secret sharing protocol with four-state Grover algorithm. The protocol has several advantages. It uses only four initial states which simplifies its experimental implementation. It has a higher encoding capacity, each two-qubit state provides two bits of information. We have experimentally demonstrated the protocol in a nuclear magnetic resonance quantum information processor successfully.

Research highlights
► We propose a quantum secret sharing protocol with four-state Grover algorithm.
► It has a higher encoding capacity and is simple to implement.
► We have experimentally demonstrated in NMR quantum system.