Multiparty quantum remote control

Hao Jia, Yu‐Guang Yang, Yuechao Wang +4 more

Chen, Ai-Xi, Deng +3 more

Meiyu Wang, Hao Guo

Hao Jia, Yu‐Guang Yang, Yuechao Wang +4 more

Abstract Multiparty‐controlled joint remote state preparation (MCJRSP) enables multiple senders to jointly prepare an arbitrary state for a distant receiver via the control of multiple agents within a quantum network. The multipartite Greenberger–Horne–Zeilinger (GHZ) state is commonly employed as a key resource in MCJRSP protocols. However, the depth requirements of unitary circuits for GHZ state preparation and the unreliable long‐distance distribution of GHZ states limit the practical applications of these MCJRSP tasks under current conditions. To overcome these limitations, a practical MCJRSP scheme is presented for remotely preparing arbitrary single‐particle state without GHZ states. This scheme is further extended to remote preparation of arbitrary multi‐particle state. The performance of the protocol is analyzed under certain types of noise, and compare it with existing GHZ‐state‐based protocols. The results indicate that the protocol exhibits superior robustness under noisy conditions when preparing multi‐particle states. Moreover, it requires fewer quantum resources and does not necessitate classical communication. Additionally, the protocol offers a unique advantage: it can tolerate an arbitrary number of non‐responsive agents. This study provides a more feasible and efficient approach for realizing MCJRSP in long‐distance quantum communication networks.

Kui Hou, Jing Wang, Yuan Hao +1 more

We propose a scheme for multiparty-controlled remote preparation of the two-particle state by using two non-maximally Greenberger–Horne–Zeilinger states as quantum channel. Our scheme consists of one sender and n remote receivers. It will be shown that the sender can help either one of the n receivers to remotely preparation the original state with the appropriate probability, and the sender Alice's two-particle projective measurement and the controllers' single-particle product measurements are needed. We also obtained the probability of the successful remote state preparation.

Dong Wang, Liu Ye, Sabre Kais

We present a strategy for implementing multiparty-controlled remote state preparation (MCRSP) for a family of four-qubit cluster-type states with genuine entanglements while employing, Greenberg-Horne-Zeilinger-class states as quantum channels. In this scenario, the encoded information is transmitted from the sender to a spatially separated receiver via the control of multi-party. Predicated on the collaboration of all participants, the desired state can be entirely restored within the receiver's place with high success probability by application of appropriate local operations and necessary classical communication . Moreover, this proposal for MCRSP can be faithfully achieved with unit total success probability when the quantum channels are distilled to maximally entangled ones.