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Search Publications by: Paul S. Julienne (Assoc)

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Displaying 101 - 125 of 426

Photoassociative Formation of Ultracold Polar KRb Molecules

November 1, 2004
Author(s)
Svetlana A. Kotochigova, Eite Tiesinga, Paul S. Julienne
We investigate the effectiveness of creating polar ground state KRb molecules by two-color photoassociative spectroscopy. In this process the molecules are formed from ultra-cold samples of K and Rb. Focussing on spin-polarized atoms we show that an

Adiabatic Association of Ultracold Molecules via Magnetic Field Tunable Interactions

September 14, 2004
Author(s)
K Goral, T Koehler, S A. Gardiner, Eite Tiesinga, Paul S. Julienne
We consider in detail the situation of applying a time dependent external magnetic field to a 87Rb atomic Bose-Einstein condensate held in a harmonic trap, in order to adiabatically sweep the interatomic interactions across a Feshbach resonance to produce

Four-Wave Mixing in Bose-Einstein Condensate Systems With Multiple Spin States

September 1, 2004
Author(s)
J P. Burke, Paul S. Julienne, Carl J. Williams, Y B. Band, M Trippenbach
We calculate the four-wave mixing (FWM) in a Bose Einstein condensate system having multiple spin wave packets that are initally overlapping in physical space, but have nonvanishing relative momentun that cause them to recede from one another. Three

Making Cold Molecules by Time-Dependent Feshbach Resonances

August 1, 2004
Author(s)
Paul S. Julienne, Eite Tiesinga, T Kohler
Pairs of trapped atoms can be associated to make a diatomic molecule using a time dependentMagnetic field to ramp the energy of a scattering resonance state from above to below the scatteringthreshold. A relatively simple model, parameterized in terms of

Beam-Loss Spectroscopy of Cold Collisions in a Bright Sodium Beam

April 1, 2004
Author(s)
J Ramirez-Serrano, W DeGraffenreid, J Weiner, Eite Tiesinga, Paul S. Julienne
We report beam loss photoassociation (PA) spectra of cold collisions within a slow, bright Na atom beam near the D1 resonance line. The high collimation and brilliance of the atomic beam permits the detection of atomic fluorescence loss resulting from the

Near-Threshold Photoassociation of 87 Rb 2

February 1, 2004
Author(s)
M Kemmann, R Mistrik, S Nussmann, H Helm, Carl J. Williams, Paul S. Julienne
Photoassociation of cold 87Rb (5s, fb+2) atom pairs is studied within 15 GHz of the dissociation limits 87Rb(5p3/2, fa) + 87Rb(5s, fb =2). Vibrational levels in the long range, hyperfine-manifolds of the 0? and 1g states arising from the 87Rb(5p3/2)-fine