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Summary form only given. One of the most interesting subfields of quantum optics is cavity QED - where microcavities impose nontrivial boundary conditions on the quantized electromagnetic field and alter the matter-light interactions of quantum electrodynamics. One of the first predictions of this theory was the modification of atomic spontaneous emission rates, through the use of microcavities to...
Summary form only given. We have developed a novel QD microcavity by coupling core/shell semiconductor nanocrystals resonantly to whispering gallery modes (WGMs) of a silica microsphere. We have shown that this composite microcavity system features a photon lifetime of order 0.1 Js, corresponding to Q-factors of order 10/sup 8/, four to five orders of magnitude greater than that of other semiconductor...
Summary form only given. Barium (Ba) is a versatile atom for basic quantum optical measurements because it possesses multiple transitions at conveniently accessible wavelengths which allow the creation of a variety of useful systems. This atom has been used as a three-level /spl Lambda/, cascade, and V system for driven atom and lasing without inversion experiments. Other work relied on the (6s/sup...
Summary form only given. Reconstruction of quantum states of the electromagnetic field has become an important technique in quantum optics. Tomographic algorithms to reconstruct the Wigner function and direct density matrix measurement schemes both provide a full representation of a quantum state. We are interested in the time evolution of a cavity quantum electrodynamic (QED) system that, after a...
Summary form only given. Electromagnetic fields in cavities have already been used for quantum information processing. In particular, quantum information can be stored in high-Q electromagnetic cavities, and with this respect it is important to develop schemes able to increase the quantum information storage time as much as possible, and provide therefore a good quantum state protection against the...
Summary form only given. Quantum computing has attracted much interest since it became clear that quantum computers are in principle able to solve hard computational problems more efficiently than present classical computers. The main obstacle inhibiting realizations is decoherence and for this reason error correction schemes have been invented. Recently it has become clear that there may exist states...
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