Non-Gaussian swapping of entangled resources

摘要: We investigate the continuous-variable entanglement swapping protocol in a non-Gaussian setting, with states employed either as entangled inputs and/or resources. The quality of is assessed terms teleportation fidelity achievable when using swapped shared resources protocol. thus introduce two-step cascaded quantum communication scheme that includes followed by fed general class tunable states, Squeezed Bell which, means controllable free parameters, allows to pass continuous way from Gaussian twin beams up maximally squeezed number states. In realistic instance, taking into account effects losses and imperfections, we show input two-mode squeezing increases, optimized allow for monotonically increasing enhancement compared corresponding setting. This result suggests use can be useful guarantee success presence decoherence.