Quantum discord quantifies quantum correlation between quantum systems, whichhas potential application in quantum information processing. In this paper, wepropose a scheme realizing the remote transfer of Gaussian quantum discord, inwhich another quantum discordant state or an Einstein-Podolsky-Rosen entangledstate serves as ancillary state. The calculation shows that two independentoptical modes that without direct interaction become quantum correlated afterthe transfer. The output Gaussian quantum discord can be higher than theinitial Gaussian quantum discord when optimal gain of the classical channel andthe ancillary state are chosen. The physical reason for this result comes fromthe fact that the quantum discord of an asymmetric Gaussian quantum discordantstate can be higher than that of a symmetric one. The presented scheme haspotential application in quantum information network.
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