摘要:Byusingabi-photonBell-classhyper-entangledstateasquantumchannel,theprotocolforthesymmetrybidirectionalremotestatepreparationispresented.Inthisprotocol,twolegitimateparticipants,AliceandBobcansimultaneouslypreparethedesiredsingle-particlestatesforeachotherbyusingsingle-particleprojectivemeasurementsandappropriatePaulioperators.Withthesamequantumchannel,anotherasymmetricbidirectionalremotestatepreparationprotocolisalsoproposed,inwhichAlicecanremotelyprepareasingle-qubitstateforBob,atthesametime,Bobcanalsoremotelypreparethedesiredtwo-qubitstateforAlice.Thisasymmetricprotocolincludescontrollednotgateoperation,single-qubitprojectivemeasurementandappropriateunitarytransformation.