An Efficient Scheme for Multiparty Multi-particle State Sharing

Q. Wang, 戴跃伟

Ming‐Ming Wang, Lu-Ting Tian, Zhiguo Qu

Shi Run-Hua, Liusheng Huang, Yang Wei +1 more

We present an efficient scheme for sharing an arbitrary m-qubit state with n agents. In our scheme, the sender Alice first shares m Bell states with the agent Bob, who is designated to recover the original m-qubit state. Furthermore, Alice introduces n − 1 auxiliary particles in the initial state |0⟩, applies Hadamard (H) gate and Controlled-Not (CNOT) gate operations on the particles, which make them entangled with one of m particle pairs in Bell states, and then sends them to the controllers (i.e., other n − 1 agents), where each controller only holds one particle in hand. After Alice performing m Bell-basis measurements and each controller a single-particle measurement, the recover Bob can obtain the original unknown quantum state by applying the corresponding local unitary operations on his particles. Its intrinsic efficiency for qubits approaches 100%, and the total efficiency really approaches the maximal value.

Xiu Xiao-Ming, Dong Li, Gao Ya-Jun +1 more

A theoretical scheme for multiparty multi-particle state sharing is proposed. After she introduces auxiliary particles and Einstein–Podolsky–Rosen (EPR) pairs, the sender (Alice) performs Hadamard (H) gate operations and Controlled-NOT (CNOT) gate operations on them. Subsequently, the sender leaves one particle sequence and distributes the rest particles to the other participants. And then, the sender makes Bell-state measurements on her particles and publishes the measurement outcomes via the classical channel to realize the quantum state sharing among the others. Only the simple operations are used to realize quantum state sharing. The sender may increase or decrease the number of the participants by changing the number of the auxiliary particles.

Bernardo David, Ryo Nishimaki, Samuel Ranellucci +1 more

Peng Jia-yin, Yi Xiang