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We measured the extinction of a focused light beam by a single 87Rb atom localized in an optical dipole trap and found a value of 7.2% for a focused Gaussian beam resonantly interacting with an atomic two-level system. Various models describing interaction of an atom with a focused light field are compared to explain our experimental result. Our experiment suggests that a strong coupling may be achieved...
Recent experiments towards deterministic quantum information processing with single atoms and single photons in a high-finesse optical cavity are discussed, including a single-photon server and an atom-photon interface.
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