Network mechanism for generating genuinely correlative Gaussian states*

Abstract

Generating a long-distance quantum state with genuine quantum correlation (GQC) is one of the
most essential functions of quantum networks to support quantum communication. Here, we pro-
vide a deterministic scheme for generating multimode Gaussian states with certain GQC (including
genuine entanglement). Efficient algorithms of generating multimode states are also proposed.
Our scheme is useful for resolving the bottleneck in generating some multimode Gaussian states
and may pave the way towards real world applications of
preparing multipartite quantum states in current quantum technologies.