《Barros_Cavity QED with single atoms》.ppt

Cavity QED with single atoms Single-atom laser and single-photon source Overview Introduction Part 1: Single-atom laser Experimental realization of a one-atom laser in the regime of strong coupling J. McKeever et al, Nature 425,268 (2003). Part 2: Single-photon source Deterministic generation of single photons from one atom trapped in a cavity J. McKeever et al, Science 303,1992 (2004). Introduction Introduction Introduction Part 1: Single-atom laser Part 1: Single-atom laser Part 1: Single-atom laser Part 1: Single-atom laser Part 1: Single-atom laser Part 1: Single-atom laser Part 1: Single-atom laser Part 1: Single-atom laser A strongly coupled one-atom thresholdless laser was reported. The non-classical light exhibits photon anti-bunching and sub-poissonian photon statistics. Theoretical calculations have been made to explore the behavior of the system when the length of the cavity was varied. These solutions were employed to investigate the passage from the semiclassical regime to the quantum domain. Part 2: Single-photon source Part 2: Single-photon source Part 2: Single-photon source Part 2: Single-photon source Part 2: Single-photon source Part 2: Single-photon source Part 2: Single-photon source Part 2: Single-photon source Deterministic generation of single-photon pulses by a single atom strongly coupled to an optical cavity was reported. A 16-fold suppression of joint detection of events relative to a Poisson process was obtained. The excess of coincidences was attributed to the rare two-atom events. * * Helena G. de Barros Quantum Optics and Spectroscopy Seminar Two-level atom in a cavity ??C → cavity resonance → creation and annihilation operators for the single-mode of the cavity → Pauli operators ??A → atomic resonance H. J. Kimble, Physica Scripta T76, 127 (1998) → Decay rate of the atom into free-space → Decay rate of the cavity field g → Rate of coherent atom-cavity field coupling two-level atom free cavity field at