简介：Logicqubitplaysanimportantroleincurrentquantumcommunication.Inthispaper,weproposeanefficiententanglementconcentrationprotocol(ECP)foranewkindoflogicBellstate,wherethelogicqubitistheconcatenatedGreenber-Horne-Zeilinger(C-GHZ)state.OurECPreliesonthenondemolitionpolarizationparitycheck(PPC)gatesconstructedwithcross-Kerrnonlinearity,andcandistillonepairofmaximallyentangledlogicBellstatefromtwosamepairsofless-entangledlogicBellstates.BenefitfromthenondemolitionPPCgates,theconcentratedmaximallyentangledlogicBellstatecanberemainedforfurtherapplication.Moreover,ourECPcanbercpeatedtofurtherconcentratetheless-entangledlogicBellstate.ByrepeatingtheECP.thetotalsuccessprobabilitycanbeeffectivelyincreased.Basedonabovefeatures,thisECPmaybeusefulinfuturelong-distancequantumcommunication.