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Q: Fachverband Quantenoptik und Photonik
Q 33: Quantum Optics IV
Q 33.2: Vortrag
Mittwoch, 25. März 2015, 11:15–11:30, B/gHS
Electromagnetically Induced Transparency in Interacting Entangled Media — •Daniel Viscor1, Weibin Li1,2, Sebastian Hofferberth3, and Igor Lesanovsky1 — 1School of Physics and Astronomy, The University of Nottingham, Nottingham NG7 2RD, United Kingdom — 2School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China — 35. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany
We theoretically investigate single-photon (SP) propagation and electromagnetically induced transparency (EIT) in one, two, and N one-dimensional ensembles of cold atoms, which are initially prepared with a single collective excitation, and interact via Rydberg exchange interaction (REI). For the single cloud, we conduct a detailed study of the absorptive and dispersive properties of such a medium. We show that the initial collective state, in conjunction with the REI, gives rise to a nonlocal susceptibility that produces nonlocal propagation and enhanced absorption of the SP compared to conventional Rydberg EIT. Second, we investigate the propagation of the SP entering simultaneously two spatially separated parallel clouds. We show that, under certain conditions, the SP can be partially transferred from one cloud to the other via the REI, leading to the formation of dark and bright path superpositions of the light that experience different absorption and dispersion. Finally, we generalize the analysis to the case of N clouds, and show that the dynamics of the propagating SP can be mapped on that of a free particle with complex mass.