外場驅(qū)動下耦合量子點(diǎn)中載流子的動力學(xué)行為.pdf

1、曲阜師范大學(xué)碩士學(xué)位論文外場驅(qū)動下耦合量子點(diǎn)中載流子的動力學(xué)行為姓名：劉燦德申請學(xué)位級別：碩士專業(yè)：凝聚態(tài)物理指導(dǎo)教師：蘇希玉20050401曲阜師范大學(xué)碩士研究生畢業(yè)論文AbstractWestudythed37namicalbehaviorsoftwoelectionsandelectronholepairindoublecoupledquantumdotmoleculewithanacelectricfieldInthisquan

2、tumsystem，weintroduceintothedetuningbetweentwodots，SOthisquantumsystembecomesanasymmetricsystemWiththehelpofHubbardmodelandtwo—levelsystemtheory，weinvestigatethedynamicalbehaviorsofthisquantumsystemW慫thehelpofFloquettheo

3、ryweprocessthenumericalcomputation(1)Dynamicsoftwoelectionsinasymmetricdoublecoupledquantumdotswithanac—electricfieldiSanalyzedbasedonthetwo1evelsystemstheoryandtheconditionsthatdynamicallOCalizationOccursisdeterminedThe

4、oreticalanalysisshow：dynamicallOCalizationstiIlexistsinsuchasystemunderthestrongerelectroncorrelation111etwoelectronsCanberegardedasaquasi—particlemovetogetherbetweentwodotsnedynamicsoftwoelectronsinthisquantumsystemarem

5、ainlyconfinedinIocalizationstatesWhichisconstructedbytwodouble—OCCupiedstatesWhenratiooftheamplitudeandfrequencyistherootofBesselfunctionthetwoelectronsarelocalizedinonedotThenumericalresultsdemonstratethetheoreticalanal

6、ysisreasonable(2)Wjstudythedynamicallocalizationofanexcitoninasymmetricdoublequantumdotmoleculewithanaltemating—currentfieldWeanalyzethephenomenonoflOCalizationofanexcitoninthequantumsystemwithtwolevelsystemstheoryTheore

7、ticalanalysisshow：whentheamplitudeoftheac—fieldissmall，theCoulombinteractionplaysallimportantroleandtheelectronandholecarl’tbedividedThedynamicsoftheexcitonaremainlyconfinedinalowenergysubspaceWhentheratiooftheamplitudea

8、ndfrequencyistherootofBesselfunction，electronandholearelOCalizedinonedot。tooButwhentheamplitudeoftheacfieldiSmuchlagertheelectronandholeCanbedividedThenumericalresults，basedonFloquettheorydemonstratethetheoreticalanalysi