高增益自發(fā)參量過(guò)程的多光子關(guān)聯(lián)效應(yīng).pdf

1、學(xué)號(hào)：200906304010分類(lèi)號(hào)：碩士學(xué)位論文高增益自發(fā)參量過(guò)程的多光子關(guān)聯(lián)效應(yīng)研究生姓名：張學(xué)智指導(dǎo)教師：孫金祚學(xué)科門(mén)類(lèi)：理學(xué)專(zhuān)業(yè)名稱(chēng)：理論物理論文提交日期：2012年3月31日煙臺(tái)大學(xué)碩士學(xué)位論文煙臺(tái)大學(xué)碩士學(xué)位論文IIAbstractAbstractQuantumentanglementistheceresourcefquantuminfmationquantumcomputation.Inexperimentsthesour

2、ceofquantumentanglementisoftenacquiredfromthespontaneousparametricdownconversion(SPDC)processofanonlinearcrystal.SincethequantumefficiencyofSPDCisverylowitisreasonabletothinkthattheconvertedbeamcontainstwocrelatedphotons

3、thesignalphotonidlerphotonwhichareconvertedfromapumpphoton.Thetwoentangledphotonscanberegardedasinapuretwophotonentangledstate.HoweverinarealSPDCprocessthenonlinearcrystalcanradiatealargenumberofphotonsthesephotonscanman

4、ifesteffectsofquantumentanglementthermallightcrelation.FromthispointofviewthepuretwophotonentangledstatedoesnotwkinthehighgainSPDCprocess.Inthisthesiswecalculatehighdercrelationfunctionofmultiphotoninterferenceinthecaseo

5、fhighgainSPDCwithfieldinputoutputrelationofthenonlinearcrystals.Wefindtheeffectsofquantumentanglementthermallightcrelationcaninterferebecoupledwitheachother.InthetheeticalanalysisoftwophotoncrelationinHongOuMel(HOM)inter

6、ferometerwefindthatthermallightcrelationcontributesabackgroundtermtothequantumentanglementeffects.WhentheSPDCgainincreasesthebackgroundtermincreasestoo.WecalculatethearbitraryNthderphotoncrelationfunctionofquantumlithogr

7、aphywithSPDClightthesimulationshowsthatthefringevisibilitydecreaseswhentheSPDCgainincreases.AcompensativewayistoincreasethecrelationderN.OuranalysisalsoshowsthatonecanneversurpassthetwophotondiffractionlimitwithNphotonme

8、asurement.WefurtherinvestigatethedoubleslitinterferencewithSPDClightbeamsbycalculatingthesecondderthirdderfourthdercrelationfunctions.WefindthattheeffectsofentanglementthermallightcrelationinterfereeachotherwhenthederN2.

9、Accdingtothesimulationsonthequantumentanglementeffectsinthefourthsixthdercrelationfunctionswefindmultiphotonsubwavelengthinterferencepatternscanbeobtainedinacertaintypeofmeasuringstyle.Thismeansthatthetwophotondiffractio