兩個二能級原子糾纏的產(chǎn)生和調(diào)控.pdf

1、復旦大學碩士學位論文兩個二能級原子糾纏的產(chǎn)生和調(diào)控姓名：王獻英申請學位級別：碩士專業(yè)：凝聚態(tài)物理指導教師：杜四德20070525復旦大學碩士畢業(yè)論文AbstractInthispaperwemainlyinvestigatehowtocreateentanglementandmanipulatetheentanglementinthermalfieldanddefectfieldofphotoncrystalsInthepast，the

2、rmalfieldalwayswasconsideredascoursewhichcandamagetheentanglementofsystemHoweverKilneta1foundthatthethermal啪Ullagetheseparatetwoatomsentanglein2002andtheamotmtofentanglementwasdependentontheinitialstateandthetemperatureo

3、fthermalfieldComparedwiththeaboveconditionwhentheinitialstatesoftwoatomswerecoherentWefindthatthedynamicentanglementoftwoatomswasenhancedandwealsocanmanipulatetheentanglementbychangingtheamplitudeandphaseofinitialstatesP

4、hotoncrystalsareartificiallycreatedthreedimensionalperiodicdielectricmaterialsWhentwoatomsinteractwiththedefectmodeofphotoncrystals，theybecomeentangledwhentheyexitthephotoncrystalsTheamountofentanglementisdependentonthev

5、elocityofatomtheposition、phaseandsizeofmodeWeCanmanipulatetheentanglementbychangingtheseparameters[5152】Creatingandmanipulatingentanglementcanmakethequantumgatebe虻ometrueandmakethequantumcommunicationpossibleInreference【

6、52】，authorsshowedthedualrailHadamardgate、dualrailnotgate、SWAPgateanddualrailZgatebycreatingandmanipulatingtheentanglementoftwoatomsinphotoncrystalsButauthorsdidnotconsiderthetemperatureoffieldmodeInfacLthetemperaturealwa

7、ysexistsduringexperimentIfweconsiderthetemperaturewhentheatomsinteractwiththedefectfieldmode，itismoremeaningfulandpracticalinquantuminformationprocessThisis0111“followingworkI【七ywonk：Quantumentanglement，Atomicentanglemen