内容包括：一、二能级原子的相干性质二、三能级原子的相干性质三、四能级原子的相性质四、微纳结构附近的量子相干性质五、非线性量子光学六、原子系综中的量子信息过程12
12 内容包括： 一、二能级原子的相干性质 二、三能级原子的相干性质 三、四能级原子的相干性质 四、微纳结构附近的量子相干性质 五、非线性量子光学 六、原子系综中的量子信息过程
Coherentpopulationtrapping(CPT)Dressed state theoryThree Type of EIT= Creiug+4)t1g>+Geiwg+ant1g)eee2+Creiwetley02WWi02A,=wegrw,V.*OA182)A=ww(g1)H8)VetDV-configurationOA-configurationSVaVe2三-configuration02Cascade-configurationTwo-photonresonance019Ladder-configurationcondition△1=42CPT and EIT happen in above three types of 3-levelatom.Contributor:Alzetta,G.,Gozzini,A.Moi.L.and Orriols13
Coherent population trapping (CPT) Contributor:Alzetta, G., Gozzini, A., Moi, L., and Orriols Dressed state theory Two-photon resonance condition D1=D2 e g2 w1 w2 g1 g 2 e w1 w2 1e 1e w1 w2 g 2 e Three Type of EIT L-configuration V-configuration X-configuration Cascade-configuration Ladder-configuration CPT and EIT happen in above three types of 3-level atom. 13
Electromagneticallyinducedtransparency(EiT)0OLLROSEVCZITANEONXOINTwo-photon resonance condition:VAON0p-0,=02-0102Position of ac stark splittings :PROBEFREQUENCY(0-/F2)dressed state structure.S.E.Harris.PhysicsToday,50,36(1997)14
S. E. Harris, Physics Today, 50, 36 (1997) Two-photon resonance condition: wp-wc=w2-w1 Position of ac stark splittings : dressed state structure. Electromagnetically induced transparency (EIT) 14
ObservationofElTRbqasladder-typesystemSrcellRapidlyvaryingrefractiveindex1.0(a)Reductioningroupvelocity0.08(c)(a)1020.06uonc0.04osgNSN0.020.00.001.0(b)(b)(d)0.2比0.0Theory0.50.2-500O500-5000500Probe detuning (MHz).PROBELASERDETUNING(CM-1)ObservationofelectromagneticallyinducedtransparencyK.-J.Boller,A.lmamoglu,andS.E.Harris,Phys.Rev.Lett.66,2593(1991).Measurementofdispersivepropertiesofelectromagneticallyinduced transparencyinRubidiumatoms,M.Xlao,et al.,Phys.Rev.Lett.74,666(1995)15
Observation of EIT Sr cell Observation of electromagnetically induced transparency, K.–J. Boller, A. Imamoglu, and S. E. Harris, Phys. Rev. Lett. 66, 2593 (1991). Measurement of dispersive properties of electromagnetically induced transparency in Rubidium atoms, M. XIao, et al., Phys. Rev. Lett. 74, 666 (1995). Rb gas ladder-type system Rapidly varying refractive index Reduction in group velocity 15
Thesubluminal lightpropagationsodium1[4) = |F =3. M,= 2)=1+2㎡Rex(0,)+2T0,R60MHzV[3 = [F =2, M, = 2)0D,lineOc0.80入=589nm0.70.6osse0.5[2) = [F 2, M, = 2)1.8GHz0.4[1) = [F =1, M,= 1)0.30.20.125T=450nK1.006oelay = 7.05 ± 0.05 μ5L = 229 ± 3 μm1.004(Aw)xepul%=32.5±0.5ms1.002[eub/sne1.000JW0.998e0.9960.994Probe detuning (MHz)Time usApplications:Nonlinear quantumoptics and Quantum information16Lightspeedreductionto17metrespersecond inanultracold atomicgas,HauLV,HarrisSE,DuttonZ,BehrooziCH,Nature397,594(1999)
16 The subluminal light propagation Light speed reduction to 17 metres per second in an ultracold atomic gas , Hau LV, Harris SE, Dutton Z, Behroozi CH, Nature 397, 594 (1999). Applications: Nonlinear quantum optics and Quantum information sodium