超冷异核分子相干产生的绝热条件及量子控制研究

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1、河南师范大学硕士学位论文超冷异核分子相干产生的绝热条件及量子控制研究姓名：郑发亮申请学位级别：硕士专业：原子与分子物理指导教师：景辉20090601在第六章中，我们对本文的主要结果进行了总结，并对以后的研究工作进行了展望。关键词：玻色一爱因斯坦凝聚，磁共振，光缔合，绝热定理，压缩效应IIABSTRACTQuantumsuperchemistryandquantumcoherentcontrolofultracoldmoleculeisoneofthesignificantareasofatoma

2、ndmoleculephysicsandopticsandplays锄importantpartinhighprecisionmeasurement’quantuminformationstorage、manipulationandextractivetechnology．Inthispaper,wefocusonstudyingadiabaticconditionforcoherentatom-heteronuclear-moleculeconversion,quantumsqueezinge

3、ffectsincreatingtriatomicmoleculesfromultracoldatoms，andcreatingatom-moleculeentanglementfromatwo-speciesatomicBoseCondensate．Inthefirstchapter,wedescribedthephenomenonofBose-Einsteincondensation，thetechnologyoflasercoolingandneutralatomtrapping,thec

4、onditionsfortherealizationofBose-EinsteincondensationandthedevelopmentofBose-Einsteincondensationathomeandabroad．Theseprovidethebasisofcreatingultracoldmolecules．Thenweintroducedtwotechniquesofcreatingultracoldmolecules，namely,opticalphotoassoeiation

5、andmagneticFeshbachresonance，andpresentedthephysicalmechanismofcreatingultracoldmoleculesviaopticalphotoassociationandmagneticFeshbaehresonanceandthecurrentsituationofcreatingultraeoldmolecules．Inthesecondchaper,asatheoreticalbasis，weintroducedsomeco

6、nceptsandimportantexperimentsaboutquantumopticsandultracoldphysics，forexample，HBTinterference，whichplayacrucialroleinquantumoptics．Inthethirdchaper,wehavestudiedadiabaticconditionsforcoherentatom-heteronuclear-moleculeconversionintwo·-speciesBose··Ei

7、nsteinCondensatebyusingthemean··fieldapproximationandthestimulatedRamanadiabaticpassage(STIRAP)technique．WehavefoundthattheformationofheteronuclearmoleculesWasmoredifficultthanthatofhomonucleardimersandisalsolowerinyields，whichisconsistentwiththeresu

8、ltsinrecentexperiments．Forthecreationoftrimers，therearetwodifferentreactionpaths；weobtionedtwodifferentadiabaticconditions．Theyieldsoftrimersareconsistentwiththeresultsincludingcollisions．Thenweanalyzedtherolesofnon—idealfactors，includingthecollision