Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications by: Paul S. Julienne (Assoc)

Search Title, Abstract, Conference, Citation, Keyword or Author
Displaying 26 - 50 of 213

Really Cool Molecules

October 16, 2008
Author(s)
Paul S. Julienne
Ultracold molecules have been made by applying a time-dependent magnetic field to a dilute quantum gas of ultracold trapped fermionic atoms. This raises the prospect of creating novel superfluids and molecular Bose-Einstein condensates.

Two-Body Transients in Coupled Atomic-Molecular BECs

March 3, 2008
Author(s)
Pascal Naidon, Eite Tiesinga, Paul S. Julienne
We discuss the dynamics of an atomic Bose-Einstein condensate when pairs of atoms are converted into molecules by single-color photoassociation. Three main regimes are found and it is shown that they can be understood on the basis oftime-dependent two-body

Effective-Range Description of a Bose Gas Under Strong Confinement

January 29, 2007
Author(s)
Pascal Naidon, Eite Tiesinga, William F. Mitchell, Paul S. Julienne
We point out in this paper that previous theories describing s-wave collisions of atomic bosons confined in 1D or 2D geometries can be extended to much tighter confinements by simply replacing the scattering length by the effective energy-dependent

Stationary Phase Approximation for the Strength of Optical Feshbach Resonances

August 7, 2006
Author(s)
R Ciurylo, Eite Tiesinga, Paul S. Julienne
Analytic expressions for the width and shift of a photoassociative resonance or an optically induced Feshbach resonance in ultra-cold collisions are derived using the quasi-classical stationary phase approximation. This approach is applicable over a wider

Multichannel Quantum-Defect Theory for Slow Atomic Collisions

October 28, 2005
Author(s)
B Gao, Eite Tiesinga, Carl J. Williams, Paul S. Julienne
We present a multichannel quantum-defect theory for slow atomic collisions that takes advantages of the analytic solutions for the long-range potential, and both the energy and the angular-momentum insensitivities of the short-range parameters. The theory

Precise Determination of 6 Li Cold Collision Parameters by Radio-Frequency Spectroscopy on Weakly Bound Molecules

March 1, 2005
Author(s)
M Bartenstein, A Altmeyer, S Riedl, R Geursen, S Jochim, C Chin, J Hecker Denschlag, R Grimm, Andrea Simoni, Eite Tiesinga, Carl J. Williams, Paul S. Julienne
Radio-frequency spectroscopy on weakly bound 6 Li_2 molecules determines to high precision the molecular binding energies and the energy splitting between molecular states. By fitting the measurement to a multi-channel quantum scattering model, we

Feshbach Resonances in Fermionic 6 Li

January 1, 2005
Author(s)
C H. Schunck, M W. Zwierlein, C A. Stan, S M. Raupach, W Ketterle, Andrea Simoni, Eite Tiesinga, Carl J. Williams, Paul S. Julienne

Radio-Frequency Transitions on Weakly Bound Ultracold Molecules

January 1, 2005
Author(s)
C Chin, Paul S. Julienne
We show that radio-frequency spectroscopy on weakly-bound molecules is a powerful and sensitive tool to probe molecular energy structure as well as atomic scattering properties. An analytic expression of the rf excitation lineshape is derived, which in

Spontaneous Dissociation of Long-Range Feshbach Molecules

January 1, 2005
Author(s)
T K hler, Eite Tiesinga, Paul S. Julienne
We study the spontaneous dissociation of diatomic molecules produced in cold atomic gases via magnetic field tunable Feshbach resonances. We provide a universal formula for the lifetime of these molecules that relates their decay to the scattering length