Publications

Displaying 201 - 225 of 426

Calculations of Collisions Between Cold Alkaline-Earth-Metal Atoms in a Weak Laser Field

September 1, 2001

Author(s)

M Machholm, Paul S. Julienne, K A. Suominem

We calculate the light-induced collisional loss of laser-cooled and trapped magnesium atoms for detunings up to 50 atomic linewidths to the red of the 1S o- 1P 1 cooling transition. We evaluate loss rate coefficients due to both radiative and nonradiative

Suppression of Elastic Scattering Loss for Slowly Colliding Bose-Einstein Condensates

August 1, 2001

Author(s)

Y B. Band, J P. Burke, A Simoni, Paul S. Julienne

Partial superfluid suppression of the elastic scattering loss in atomic Bose condensed systems is significant when the ratio of the relative velocity of the wavepackets to the critical velocity is set to be close to unity, as in experiments similar to

Collisional Frequency Shifts in 133 Cs Fountain Clocks

April 1, 2001

Author(s)

P J. Leo, Paul S. Julienne, F H. Mies, Carl J. Williams

We present a theoretical analysis of the pressure shift in Cs fountain clocks using the highly constrained binary collision model described by Leo et al. [Phys. Rev. Lett. xx, xx (2000)]. We predict a reversal in the pressure shift at temperatures near 0

Calculations of Collisions Between Cold Alkaline Earth Atoms in a Weak Laser Field

January 1, 2001

Author(s)

M Machholm, Paul S. Julienne, K -. Suominen

Collisional Frequency Shifts in 133 Cs Fountain Clocks

January 1, 2001

Author(s)

P J. Leo, Paul S. Julienne, F H. Mies, Carl J. Williams

Relativistic Ab Initio Treatment of the Second-Order Spin-Orbit Splitting of the a 3 S + u Potential of Rubidium and Cesium Dimers

January 1, 2001

Author(s)

Svetlana A. Kotochigova, Eite Tiesinga, Paul S. Julienne

We have calculated the splitting between the 0 and 1u components of the a3S state of Rb2 and Cs2 using a relativistic ab initio configuration-interaction valence bond method. This so-called second-order spin-orbit splitting is entirely due to relativistic

Suppression of Elastic Scattering Loss for Slowly Colliding Bose Condensates

January 1, 2001

Author(s)

Y B. Band, J P. Burke, Jr, Andrea Simoni, Paul S. Julienne

Trapping Atoms with Evanescent Light Fields from Integrated Waveguides, ed. by Y.B. Band

January 1, 2001

Author(s)

J P. Burke, Jr, S T. Chu, Garnett W. Bryant, Carl J. Williams, Paul S. Julienne

Ground State Scattering Lengths for Potassium Isotopes Determined by Double-Resonance Photoassociative Spectroscopy of Ultracold 39 K

November 1, 2000

Author(s)

Haonan Wang, A N. Nikolov, J R. Ensher, P L. Gould, E E. Eyler, W C. Stwalley, J P. Burke, J L. Bohn, C H. Greene, Eite Tiesinga, Carl J. Williams, Paul S. Julienne

We use double-resonance photoassociative spectroscopy of ultracold 39K atoms to precisely determine the triplet a 3Σ scattering length for the various isotopes of potassium. Photoassociation of free 39K atoms to the pure long-range 0 (v' = O, J' = 2) level

Reflection Approximation in Photoassociation Spectroscopy

November 1, 2000

Author(s)

C Boisseau, E Audouard, J Vigue, Paul S. Julienne

We construct an analytical wavefunction in the phase-amplitude formalism to describe collisions between two neutral atoms. This wavefunction is valid from intermediate to asymptotic internuclear distance over a large energy range near zero energy; and is

Atom Loss and the Formation of a Molecular Bose-Einstein Condensate by Feshbach Resonance

October 1, 2000

Author(s)

V Yurovsky, A Ben-Reuven, Paul S. Julienne, Carl J. Williams

In experiments conducted recently at MIT on Na Bose-Einstein condensates [S. Inouye et al. Nature 392. 151 (1998): J. Stenger et al, Phys. Rev. Lett. 82. 2422 (1999)], large loss rates were observed when a time-varying magnetic field was used to tune a

Collision Properties of Ultracold 133 Cs Atoms

September 1, 2000

Author(s)

P J. Leo, Carl J. Williams, Paul S. Julienne

We present a theoretical analysis of numerous magnetically tunable Feshbach resonances measured by Vladan et al. at fields of up to 25 m T. This analysis provides the most accurate characterization of the collisional properties of ground state Cs atoms

Theory of Four-Wave Mixing of Matter Waves from a Bose-Einstein Condensate

August 1, 2000

Author(s)

M Trippenbach, Y B. Band, Paul S. Julienne

A recent experiment [Deng et al., Nature 398, 218 (1999)] demonstrated the four-wave mixing of matter wavepackets created from a Bose-Einstein condensate. The experiment utilized light pulses to create two high-momentum wavepackets via Bragg diffraction

Search Publications by: Paul S. Julienne (Assoc)