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Quantum Optics experiments with single Barium Ions

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In this talk I’ll discuse a variety of fundamental quantum optics experiments performed with individually trapped barium ions interacting with continuous laser light. In a first experiment I’ll discuss the first measurement of an intensity-field correlation function on a single-atom single-photon basis. This correlation function revealed the time evolution of the source-field of the fluorescence after the detection of a photon [1]. Then I’ll present an experiment using a Hong-Ou-Mandel type setup, where the two-photon interference between two radiating ions situated in distinct traps was measured [2]. The last experiment discusses recent results, where we measured an electromagnetically induced transparency (EIT) using a single atom [3]. [1] S. Gerber, D. Rotter, L. Slodicka, J. Eschner, H. J. Carmichael, and R. Blatt, Phys. Rev. Lett. 102, 183601 (2009). [2] S. Gerber, D. Rotter, M. Hennrich, R. Blatt, F. Rohde, C. Schuck, M. Almendros, R. Gehr, F. Dubin, J. Eschner, New. J. Phys. 11, 013032 (2009). [3] L. Slodicka, G. Hetet, S. Gerber, M. Hennrich, R. Blatt, arXiv:1005.3289 (2010)

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