Correlated noise enhances performance of joint remote state preparation in quantum multi-hop network

Abstract

Joint remote state preparation （JRSP for short）can increase the security of quantum communication by distributing different parts of classical information to different senders. However, the communication efficiency in terms of fidelity decreases with the increase of intermediate nodes in multi-hop network. In this paper, we try to explore methods to improve fidelity of JRSP in multi-hop network presented by Zhang and Chen in 2023 Phys. Scr. 98 065107. Specifically, correlated Pauli noise with partial memory was introduced into the the shared channel. We find that the fidelity increases with the increase of memory parameters, which compensates for the loss of fidelity caused by the increase of network nodes.

Quantum information splitting among N-quantum nodes within a quantum network by using Bell states

“…QE is an essential and important resource in quantum science and technology [1]. QE is the key ingredient of various quantum information processing tasks such as quantum teleportation [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18], remote state preparation [19][20][21][22][23][24], superdense coding [25][26][27], quantum state sharing [28][29][30], quantum key distribution [31][32][33][34] and quantum secure direct communication [35][36][37] etc Generally, the entangled state used as the quantum channels is generated by exploiting the same degrees of freedom of two or more quantum systems. However, it has been reported that the capacity of quantum communication schemes can be enhanced by exploiting multiple degrees of freedom for the generation of entanglement, called hyperentanglement [38,39], between two or more quantum systems.…”