摘要We show that it is possible to generate Einstein--Podolsky--Rosen (EPR) entangled radiation using an atomic reservoir controlled by coherent population trapping. A beam of three-level atoms is initially prepared in near-coherent population trapping (CPT) state and acts as a long-lived coherence-controlled reservoir. Four-wave mixing leads to amplification of cavity modes resonant with Rabi sidebands of the atomic dipole transitions. The cavity modes evolve into an EPR state, whose degree of entanglement is controlled by the intensities and the frequencies of the driving fields. This scheme uses the long-lived CPT coherence and is robust against spontaneous emission of the atomic beam. At the same time, this scheme is implemented in a one-step procedure, not in a two-step procedure as was required in Phys. Rev. Lett. 98(2007)240401.
Abstract：We show that it is possible to generate Einstein--Podolsky--Rosen (EPR) entangled radiation using an atomic reservoir controlled by coherent population trapping. A beam of three-level atoms is initially prepared in near-coherent population trapping (CPT) state and acts as a long-lived coherence-controlled reservoir. Four-wave mixing leads to amplification of cavity modes resonant with Rabi sidebands of the atomic dipole transitions. The cavity modes evolve into an EPR state, whose degree of entanglement is controlled by the intensities and the frequencies of the driving fields. This scheme uses the long-lived CPT coherence and is robust against spontaneous emission of the atomic beam. At the same time, this scheme is implemented in a one-step procedure, not in a two-step procedure as was required in Phys. Rev. Lett. 98(2007)240401.
Li Qian;ZHONG Wen-Xue;HU Xiang-Ming. Entangled Radiation through an Atomic Reservoir Controlled by Coherent Population Trapping[J]. 中国物理快报, 2008, 25(9): 3234-3237.
Li Qian, ZHONG Wen-Xue, HU Xiang-Ming. Entangled Radiation through an Atomic Reservoir Controlled by Coherent Population Trapping. Chin. Phys. Lett., 2008, 25(9): 3234-3237.
[1] Arimondo E 1996 Progress in Optics ed Wolf E(Amsterdam: Elsevier) vol {35 p 257 [2] Harris S E 1997 Phys. Today 50(7) 36 [3] Marangos J P 1998 J. Mod. Opt. 45 471 [4] Lukin M D and Imamoglu A 2001 Nature 413 273 Lukin M D 2003 Rev. Mod. Phys. 75 457 [5] Fleischhauer M, Imamoglu A and Marangos I P 2005 Rev. Mod. Phys. 77 633 [6] Kocharovskaya O 1992 Phys. Rep. 219 175 [7] Scully M O 1992 Phys. Rep. 219 191 [8] Mandel P 1994 Contemp. Phys. 34 235 [9] Mompart J and Corbalan R 2000 J. Opt. B 2 R7 [10] Zhu S Y and Scully M O 1996 Phys. Rev. Lett.{\em \ %76 388 [11] Li F L, Gao S Y, and Zhu S Y 2003 Phys. Rev. A 67 063818 [12] Zhang H Z, Tang S H, Dong P and He J 2002 Phys.Rev. A 65 063802 [13] Hu X M, Shi W X, Xu Q, Guo H J, Li J Y and Li X\ X 2006 Phys. Lett. A 352 543 Hu X M, Xu Q, Li J Y, Li X\ X, Shi W X and Zhang X 2006 Opt. Commun. 260 196 [14] Einstein A, Podolsky B, and Rosen N 1935 Phys.Rev. 47 777 [15] Xiong H, Scully M O and Zubairy M S 2005 Phys.Rev. Lett. 94 023601 Tan H T, Zhu S Y and Zubairy M S 2005 Phys. Rev. A 72 022305 [16] Payne M G and Deng L 2003 Phys. Rev. Lett. 91 123602 Payne M G, Hagley E W and Deng L 2004 Phys. Rev. A 69 063803 Ikram M, Li G X and Zubaity M S 2007 Phys. Rev. A 76 042317 [17] Pielawa S, Morigi G, Vitali D and Davidocich L 2007 Phys. Rev. Lett. 98 240401 [18] Scully M O and Zubairy M S 1997 Quantum Optics(Cambridge: Cambridge University Press) [19] Cohen-Tannoudji C, Dupont-Roc J and Grynberg G 1992 Atom-Photon Interactions (New York: Wiley-Interscience) p 460 [20] Peng J S and Li G X 1998 Introduction to ModernQuantum Optics (Singapore: World Scientific) [21] Sargent III M, Scully M O and Lamb W E 1974 LaserPhysics (New York: Addison-Wesley) [22] Duan L M, Giedke G, Cirac J I and Zoller P 2000 Phys. Rev. Lett. 84 2722 [23] Lukin M D 2003 Rev. Mod. Phys. 75 457 Raimond J M, Brune M and Haroche S 2001 Rev. Mod.Phys. 73 565 [24] Bergmann K, Theuer H and Shore B W 1998 Rev. Mod.Phys. 70 1003 [25 Li P 2008 Phys. Rev. A 77 015809
2008, Vol. 25 
