28,216 research outputs found

    On the coupling of two quantum dots through a cavity mode

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    The effective coupling of two distant quantum dots through virtual photon exchange in a semiconductor microcavity is studied. The experimental conditions for strong coupling and its manifestation in the spectra of emission are analyzed.Comment: 2 pages, 1 figur

    Incoherent Mollow triplet

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    A counterpart of the Mollow triplet (luminescence lineshape of a two-level system under coherent excitation) is obtained for the case of incoherent excitation in a cavity. Its analytical expression, in excellent agreement with numerical results, pinpoints analogies and differences between the conventional resonance fluorescence spectrum and its cavity QED analogue under incoherent excitation.Comment: 4 pages, 3 figure

    On Schr\"odinger's equation, 3-dimensional Bessel bridges, and passage time problems

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    In this work we relate the density of the first-passage time of a Wiener process to a moving boundary with the three dimensional Bessel bridge process and a solution of the heat equation with a moving boundary. We provide bounds

    Open Heavy Flavor Production in p-p and Pb-Pb collisions as seen by ALICE at the LHC

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    Charm and beauty production are probed with the ALICE experiment at the LHC by studying the single lepton transverse momentum distribution (electrons at mid-rapidity, muons at large-rapidities) and D mesons reconstructed in their hadronic decays. The differential production cross sections in proton proton interactions show a good agreement with perturbative QCD calculations at both sqrt(s) = 2.76 and 7 TeV. The measurements in lead lead reactions at sqrt(s_{NN})= 2.76 TeV evidence a reduction (or suppression) of the production rate at intermediate and high pt in the most central collisions with respect to the rate in proton proton interactions.Comment: To appear in the Proceedings of the 19th Particles and Nuclei International Conference, PANIC 201

    Heavy-flavor suppression and azimuthal anisotropy in Pb-Pb collisions at sqrt(s_{NN}) = 2.76 TeV with the ALICE detector

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    Heavy-flavor hadron production studies in Pb-Pb collisions at sqrt(s_{NN}) = 2.76 TeV with the 2010 and 2011 data samples are presented. The measurements are performed with the ALICE detector in various decay channels and in a wide kinematic range. Heavy-flavor hadrons exhibit a suppression in the most central Pb-Pb collisions that amounts to a factor 3-5 for pT ~ 8-10 GeV/c. The second harmonic of the azimuthal distribution Fourier decomposition, v2, is non-zero for non-central collisions at intermediate pT (~3 GeV/c).Comment: Quark Matter 2012 proceeding
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