Showing results 81 to 100 of 163
 Creation of Dicke States in Distant Qubits with Linear Optics; ; Bastin, Thierry  et alConference (2007) Detailed reference viewed: 4 (0 ULg)Le micromaser à atomes froidsMartin, John ; Bastin, Thierry Scientific conference (2006, January) Detailed reference viewed: 9 (2 ULg) Measure of phonon-number moments and motional quadratures through infinitesimal-time probing of trapped ionsBastin, Thierry ; ; in Journal of Physics : B Atomic Molecular & Optical Physics (2006), 39 A method for gaining information about the phonon-number moments and the generalized nonlinear and linear quadratures in the motion of trapped ions (in particular, position and momentum) is proposed ... [more ▼] A method for gaining information about the phonon-number moments and the generalized nonlinear and linear quadratures in the motion of trapped ions (in particular, position and momentum) is proposed, valid inside and outside the Lamb-Dicke regime. It is based on the measurement of first time derivatives of electronic populations, evaluated at the motion-probe interaction time tau = 0. In contrast to other state-reconstruction proposals, based on measuring Rabi oscillations or dispersive interactions, the present scheme can be performed resonantly at infinitesimal short motion-probe interaction times, remaining thus insensitive to decoherence processes. [less ▲] Detailed reference viewed: 14 (5 ULg)Measurement-induced spatial modulation of spontaneous decay and photon arrival times; Bastin, Thierry ; in Physical Review. A (2006), 74 We report a way of manipulating the spontaneous emission process leading to a spatial modulation of spontaneous decay. The effect is observed in the case of coherently driven atoms separated by less than ... [more ▼] We report a way of manipulating the spontaneous emission process leading to a spatial modulation of spontaneous decay. The effect is observed in the case of coherently driven atoms separated by less than a transition wavelength. It is quantified by Glauber's photon-photon second-order correlation function. We show that the photon arrival time, usually regarded as an entirely random process, depends not only on where a photon is detected but also on where a former photon had been recorded previously. Our results shed light on the unexpected consequences of state reduction and entanglement for the fundamental process of spontaneous emission. [less ▲] Detailed reference viewed: 4 (0 ULg)Decoherence of an Entangled Atomic Pair; Bastin, Thierry ; Conference (2006) Detailed reference viewed: 6 (1 ULg)Generating Dicke states with photodetector arrays in trapped ions; ; Bastin, Thierry et alPoster (2006) Detuning effects in the vertical cold atom micromaserMartin, John ; Bastin, Thierry Poster (2006) Detailed reference viewed: 4 (2 ULg)Measurement-induced spatial modulation of spontaneous decay and photon arrival times; Bastin, Thierry ; Poster (2006) Detailed reference viewed: 1 (0 ULg)Measure of phonon-number moments and motional quadratures through infinitesimal-time probing of trapped ionsBastin, Thierry ; ; Poster (2006) Detailed reference viewed: 3 (1 ULg)The cold atom micromaser with Lambda-type three-level atomsMartin, John ; Bastin, Thierry Poster (2005) Detailed reference viewed: 12 (3 ULg)Non-classical Radiation from Two Atoms and Quantum Search Algorithms; ; Bastin, Thierry Conference (2005) Detailed reference viewed: 6 (1 ULg)Les Horloges AtomiquesBastin, Thierry in Bulletin de la Société Royale des Sciences de Liège (2005), 74 In this paper, a short review of the basic physical mechanisms underlying the atomic clocks is given. We cover the standard cesium atomic clocks along with the new generation of cold atom clocks. Detailed reference viewed: 26 (9 ULg)DSM from SPOT5-HRS images: extraction and validationCornet, Yves ; ; Binard, Marc et alin Jacobsen, K.; Goossens, Rudi; Winkler, P. (Eds.) Proceding of the EARSeL Workshop 3D-Remote Sensing: Porto, June 10 - 11, 2005 (2005) Detailed reference viewed: 88 (30 ULg)Quantum theory of the cold-atom micromaser including gravityBastin, Thierry ; Martin, John in Physical Review. A (2005), 72 The quantum theory of the cold-atom micromaser including the effects of gravity is considered. We show that gravity does not break the special properties of the induced emission probability for the ... [more ▼] The quantum theory of the cold-atom micromaser including the effects of gravity is considered. We show that gravity does not break the special properties of the induced emission probability for the micromaser in the cold atom regime and rather new effects are predicted. In particular, we show that the cavity acts in the gravity field as an additional repulsive and attractive potential, resulting in quasibound states of the atomic motion. This feature gives rise to fine resonances in the induced emission probability that are not restricted to any particular cavity mode function, in contrast to the usual cold-atom micromaser. It is also shown that the atom is able to emit a photon inside the cavity, though classically it does not reach the interaction region. Predictions about the photon number statistics when the cavity is pumped by a flux of excited atoms are finally given. Unusual highly nonclassical "dragon" distributions are still predicted in the vertical geometry. (c) 2005 American Institute of Physics. [less ▲] Detailed reference viewed: 18 (8 ULg) Reply to "Comment on 'Detuning effects in the one-photon mazer' "Bastin, Thierry ; Martin, John in Physical Review. A (2004), 70 We refute in this Reply the criticisms made by Abdel-Aty. We show that none of them are founded and we demonstrate very explicitly what is wrong with the arguments developed by this author. Detailed reference viewed: 41 (3 ULg)Transmission of ultracold atoms through a micromaser: detuning effectsMartin, John ; Bastin, Thierry in European Physical Journal D -- Atoms, Molecules, Clusters & Optical Physics (2004), 29 The transmission probability of ultracold atoms through a micromaser is studied in the general case where a detuning between the cavity mode and the atomic transition frequencies is present. We generalize ... [more ▼] The transmission probability of ultracold atoms through a micromaser is studied in the general case where a detuning between the cavity mode and the atomic transition frequencies is present. We generalize previous results established in the resonant case (zero detuning) for the mesa mode function. In particular, it is shown that the velocity selection of cold atoms passing through the micromaser can be very easily tuned and enhanced using a non-resonant field inside the cavity. Also, the transmission probability exhibits with respect to the detuning very sharp resonances that could define single cavity devices for high accuracy metrology purposes (atomic clocks). [less ▲] Detailed reference viewed: 19 (8 ULg)1s2s2p(2)3p 6L - 1s2p(3)3p 6p transitions in OIV, FV and NeVI; ; et al in Journal of Physics : B Atomic Molecular & Optical Physics (2004), 37 We present observations of VUV transitions between doubly excited sextet states in O, IV, F V and Ne VI. Spectra were produced by collisions of an O+, (FH)(+) and Ne+ beam with a thin carbon foil target ... [more ▼] We present observations of VUV transitions between doubly excited sextet states in O, IV, F V and Ne VI. Spectra were produced by collisions of an O+, (FH)(+) and Ne+ beam with a thin carbon foil target. Some observed lines are assigned to the 1s2s2p(2)3p L-6-1 s2p(3)3p P-6 electric-dipole transitions in 0 IV, F V and Ne VI, and are compared with the results of multi-configuration Hartree-Fock (with QED and higher-order corrections) and multi-configuration Dirac-Fock calculations. 31 new lines have been identified. The sextet systems of boronlike ions are possible candidates for x-ray and VUV lasers. [less ▲] Detailed reference viewed: 26 (4 ULg)The two-dimensional cold atom micromaserMartin, John ; Bastin, Thierry Poster (2004) Detailed reference viewed: 10 (1 ULg)Le micromaser à atomes froidsMartin, John ; Bastin, Thierry Conference (2004) Detailed reference viewed: 2 (2 ULg) |
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