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Displaying 51 - 75 of 154

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

Precision Feshbach Spectroscopy of Ultracold Cs-2

September 1, 2004
Author(s)
C Chin, Vladan Vuletic, A J. Kerman, S G. Chu, Eite Tiesinga, P J. Leo, Carl J. Williams
We have observed > 60 magnetic field-induced Feshbach resonances in ultra-cold collisions of ground-state cesium atoms. The resonances have been detected using three different scattering processes: elastic collisions, inelastic collisions and radiative

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

Ballistic Expansion and Collisions in the Cs Atomic Fountain Clock

January 1, 2004
Author(s)
V Venturi, Eite Tiesinga, Carl J. Williams
We study the effects of the ballistic expansion of an atomic cloud on theoretical predictions of the collisional shifts in the Cesium atomic fountain clock. Due to the strong energy dependence of the collisional shift, we find that the ballistic expansion