Experimental Generation of Narrow-Band Paired Photons： from Damped Rabi Oscillation to Group Delay.pdf

CHIN．PHYS．LETT．Vo1．31，No．3(2014)034205 Experim entalG eneration ofN arrow—Band Paired Photons：from Dam ped Rabi Oscillation to Group Delay uAOKai—Yu(廖开宇)，YANHui(颜辉)h，HEJun—Yu(何君钰)，HUANGWei(黄巍)， zHANGZhi—Ming(张智明)，zHUShi—Liang(朱诗亮1h LaboratoryofQuantumEngineeringandQuantumMaterials，SchoolofPhysicsandTelecommunicationEngineering， SouthChinaNormalUniversity,Guangzhou510006 LaboratoryofQuantum EngineeringandQuantum Materials，SchooiofInformationandPhotoelectronicScienceand Engineering,South ChinaNormalUniversity,Guangzhou510006 (Received16September2013) Wereporttheexperimentalgenerationofnarrow-bandpairedphotonsthroughelectromagneticallyinducedtrans— parencyandspontaneousfour-wavemixinginatwo—dimensionalmagneto—opticaltrap(2DMOT)．Bycontrolling theopticaldepthofthe2DM OTfrom 0to40．thetemporallengthofthegeneratednarrow-bandpairedphotons can bevariedrfom 50to900ns．The t‘ransition’between dampedRabioscillationandgroupdelayisobserved undisputedly．In thedamped Rabioscillationregime，aviolation factoroftheCauchy—Schwartzinequality as largeas6642isobserved． nI thegroup delay regime．sub—MHzlinewidthr^一0．65MHz)pairedphotonsare obtained withagenerationrateofabout0．8 ×10 s_。． PACS：42．50．Gy,42．50．Dv．32．80．——t DOI：10．1088／0256—307x／31／3／034205 Generatingnonclassicallightnotonlyprovidesa thedampedRabioscillationregime．aviolationfactor powerfulbenchmark too1for fundamentalresearch oftheCauchy Schwartzinequality aslargeas6642 such aS testing complementarity．hiding variables． isobserved．Inthegroupdelayregime．thesubnat— wave—particleduality．l【， butalsoplaysacriticalrole urallinewidth (^J3．2and一1．8MHz)pairedphotons in quantum computation，quantum com munication， evensub—MHzlinewidthf^√0．65MHz)pair