一維和二維關聯(lián)無序安德森模型演示文稿

一維和二維關聯(lián)無序安德森模型演示文稿現(xiàn)在是1頁\一共有24頁\編輯于星期三一維和二維關聯(lián)無序安德森模型現(xiàn)在是2頁\一共有24頁\編輯于星期三

One-andtwo-dimensionalAndersonmodelwithlong-rangecorrelated-disorderAndersonmodel-IntroductionEntanglementin1D2DEntanglement2Dconductance2Dtransmission2Dmagnetoconductance現(xiàn)在是3頁\一共有24頁\編輯于星期三Andersonmodel-IntroductionWhatisadisorderedsystem?Nolong-rangetranslationalorderTypesofdisorder

(a)crystal(b)Componentdisorder(c)positiondisorder(d)topologicaldisorder現(xiàn)在是4頁\一共有24頁\編輯于星期三diagonaldisorder

off-diagonaldisordercompletedisorderLocalizationprediction：anelectron,whenplacedinastrongdisorderedlattice,willbeimmobile[1]P.W.Anderson,Phys.Rev.109,1492(1958).

Andersonmodel-IntroductionByP.W.Andersonin1958[1]現(xiàn)在是5頁\一共有24頁\編輯于星期三Andersonmodel-IntroductionIn1983and1984Johnextendedthelocalizationconceptsuccessfullytotheclassicalwaves,suchaselasticwaveandopticalwave[1].Followingthepreviousexperimentalwork,TalSchwartzetal.realizedtheAndersonlocalizationwithdisorderedtwo-dimensionalphotoniclattices[2].[1]JohnS,SompolinskyHandStephenMJ1983Phys.Rev.B275592;JohnSandStephenMJ1983286358;JohnS1984Phys.Rev.Lett.

532169[2]SchwartzTal,BartalGuy,FishmanShmuelandSegevMordechai2007Nature

44652現(xiàn)在是6頁\一共有24頁\編輯于星期三Andersonmodel-openproblemsAbrahansetal.’sscalingtheoryforlocalizationin1979[1]（3000citations，oneofthemostimportantpapersincondensedmatterphysics）

Predictions（1）nometal-insulatortransitionin2ddisorderedsystemsSupportedbyexperimentsinearly1980s.

（2）（dephasingtime）ResultsofJ.J.Linin1987[2]

[1]E.Abrahans,P.W.Anderson,D.C.LicciardelloandT.V.Ramakrisbnan,Phys.Rev.Lett.42,673(1979)[2]J.J.LinandN.Giorano,Phys.Rev.B35,1071(1987);J.J.LinandJ.P.Bird,J.Phys.:Condes.Matter14,R501(2002).

現(xiàn)在是7頁\一共有24頁\編輯于星期三ResultsofJ.J.Linin1987[2]dephasingtime現(xiàn)在是8頁\一共有24頁\編輯于星期三WorkofHuiXuetal.onsystemswithcorrelateddisorder:劉小良，徐慧，等，物理學報，55(5)，2493（2006）；劉小良，徐慧，等，物理學報，55(6)，2949（2006）；徐慧,等，物理學報，56(2)，1208（2007）；徐慧,等，物理學報，56(3)，1643（2007）；馬松山，徐慧，等，物理學報，56(5)，5394（2007）；馬松山，徐慧，等，物理學報，56(9)，5394（2007）。現(xiàn)在是9頁\一共有24頁\編輯于星期三Andersonmodel-newpointsofview1。CorrelateddisorderCorrelationanddisorderaretwoofthemostimportantconceptsinsolidstatephysicsPower-lawcorrelateddisorderGaussiancorrelateddisorder2。Entanglement[1]：anindexformetal-insulator,localization-delocalizationtransition”entanglementisakindofunlocalcorrelation”（MPLB19,517,2005）.Entanglementofspinwavefunctions:fourstatesinonesite:0spin;1up;1down;1upand1downEntanglementofspatialwavefunctions(spinlessparticle):twostates:occupiedorunoccupiedMeasuresofentanglement：vonNewmannentropyandconcurrence[1]HaibinLiandXiaoguangWang,Mod.Phys.Lett.B19,517(2005)；JunpengCao,GangXiong,YupengWang,X.R.Wang,Int.J.Quant.Inform.4,705(2006).HefengWangandSabreKais,Int.J.Quant.Inform.4,827(2006).

現(xiàn)在是10頁\一共有24頁\編輯于星期三Andersonmodel-newpointsofview3.newapplications（1）quantumchaos（2）electrontransportinDNAchainsTheimportanceoftheproblemoftheelectrontransportinDNA[1]（3）pentacene[2]（并五苯）MolecularelectronicsOrganicfield-effect-transistorspentacene:layeredstructure,2DAndersonsystem[1]R.G.Endres,D.L.CoxandR.R.P.Singh,Rev.Mod.Phys.76,195(2004)；StephanRoche,Phys.Rev.Lett.91,108101(2003).[2]M.UngeandS.Stafstrom,SyntheticMetals,139(2003)239-244;J.Cornil,J.Ph.CalbertandJ.L.Bredas,J.Am.Chem.Soc.,123,1520-1521(2001).

DNAstructure現(xiàn)在是11頁\一共有24頁\編輯于星期三Entanglementinone-dimensionalAndersonmodelwithlong-rangecorrelateddisorder

one-dimensionalnearest-neighbortight-bindingmodelConcurrence:vonNeumannentropy

現(xiàn)在是12頁\一共有24頁\編輯于星期三Left.TheaverageconcurrenceoftheAndersonmodelwithpower-lawcorrelationasthefunctionofdisorderdegreeWandforvarious.Abandstructureisdemonstrated.Right.TheaverageconcurrenceoftheAndersonmodelwithpower-lawcorrelationfor=3.0andatthebiggerWrange.Ajumpingfromtheupperbandtothelowerbandisshown

現(xiàn)在是13頁\一共有24頁\編輯于星期三2DentanglementMethod:takingthe2Dlatticeas1Dchain[1]LongyanGongandPeiqingTong,Phys.Rev.E74(2006)056103.；Phys.Rev.A71,042333(2005).

Quantumsmallworldnetworkin[1]squarelattice現(xiàn)在是14頁\一共有24頁\編輯于星期三Left.TheaverageconcurrenceoftheAndersonmodelwithpower-lawcorrelationasthefunctionofdisorderdegreeWandforvarious.Abandstructureisdemonstrated.Right.TheaveragevonNewmannentropyoftheAndersonmodelwithpower-lawcorrelationasthefunctionofdisorderdegreeWandforvarious.Abandstructureisdemonstrated.現(xiàn)在是15頁\一共有24頁\編輯于星期三Lonczosmethod現(xiàn)在是16頁\一共有24頁\編輯于星期三EntanglementinDNAchainguanine(G),adenine(A),cytosine(C),thymine(T)QusiperiodicalmodelR-Smodeltogeneratethequsiperiodicalsequencewithfourelements(G,C,A,T).Theinflation(substitutions)ruleisG→GC;C→GA;A→TC;T→TA.StartingwithG(thefirstgeneration),thefirstseveralgenerationsareG,GC,GCGA,GCGAGCTC,GCGAGCTCGCGATAGA???.LetFitheelement(site)numberoftheR-Ssequenceintheithgeneration,wehaveFi+1=2Fifori>=1.Sothesitenumberofthefirstseveralgenerationsare1,2,4,8,16,???,andforthe12thgeneration,thesitenumberis2048.現(xiàn)在是17頁\一共有24頁\編輯于星期三TheaverageconcurrenceoftheAndersonmodelfortheDNAchainasthefunctionofsitenumber.Theresultsarecomparedwiththeuncorrelateduniformdistributioncase.

現(xiàn)在是18頁\一共有24頁\編輯于星期三SpinEntanglementofnon-interactingmultipleparticles:Green’sfunctionmethodFinitetemperaturetwobodyGreen’sfunctionOneparticledensitymatrixandOnebodyGreen’sfunctionTwoparticledensitymatrixwhere,HFapprox.現(xiàn)在是19頁\一共有24頁\編輯于星期三

Ifandwhere&whereGeneralizedWernerStatethenInbasisSeparabilitycriterion=PPT=alwayssatisfiedsince現(xiàn)在是20頁\一共有24頁\編輯于星期三ConductanceandmagnetoconductanceoftheAndersonmodelwithlong-rangecorrelateddisorder(1)Staticconductanceofthetwo-dimensionalquantumdotswithlong-rangecorrelateddisorder

Idea:thedistributionfunctionoftheconductanceinthelocalizedregime1d:clearGaussian2d:unclearMethodtocalculatingtheconductance:Green’sfunctionandKuboformula現(xiàn)在是21頁\一共有24頁\編輯于星期三Fig.1Fig.2aFig.2b現(xiàn)在是22頁\一共有24頁\編輯于星期三Fig.1ConductanceasthefunctionofFermienergyforthesystemswithpower-lawcorrelate