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Search Publications by: Charles W Clark (Assoc)

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Displaying 301 - 325 of 447

Accelerating Scientific Discovery through Computation and Visualization

November 1, 2000
Author(s)
James S. Sims, John G. Hagedorn, Peter M. Ketcham, Steven G. Satterfield, Terence J. Griffin, William L. George, H A. Fowler, B A. am Ende, Howard Hung, Robert B. Bohn, John E. Koontz, Nicos Martys, Charles E. Bouldin, James A. Warren, D L. Feder, Charles W. Clark, Bernard J. Filla, Judith E. Terrill
The rate of scientific discovery can be accelerated through computation and visualization. This acceleration results from the synergy of expertise, computing tools, and hardware for enabling high performance computation, information science, and

Dark-Soliton States of Bose Einstein Condensates in Anisotropic Traps

November 1, 2000
Author(s)
D Feder, M S. Pindzola, L A. Collins, B I. Schneider, Charles W. Clark
Dark soliton states of Bose-Einstein condensates in anisotropic traps are studied by direct solution of the time-dependent Gross-Pitaevskii equation in three dimensions. The ground and self-consistent excited states for a completely anisotropic harmonic

Detection of the BCS Transition of a Trapped Fermi-Gas

October 1, 2000
Author(s)
G M. Bruun, Charles W. Clark
We investigate theoretically the properties of a trapped gas of fermionic atoms both in the normal and the superfluid phase. A detailed analysis including the shell structure of the normal phase spectrum exactly, leads to the proposal of two observables

Imaging the Phase of an Evolving Bose-Einstein Condensate Wave Function

September 1, 2000
Author(s)
J E. Simsarian, J Denschlag, M Edwards, Charles W. Clark, Lu Deng, Edward W. Hagley, Kristian Helmerson, S L. Rolston, William D. Phillips
We demonstrate a spatially resolved autocorrelation measurement with a Bose-Einstein condensate (BEC) and measure the evolution of the spatial profile of its quantum mechanical phase. After releasing the BEC from the magnetic trap, the phase develops a

Ideal Gases in Time-Dependent Traps

June 1, 2000
Author(s)
G M. Bruun, Charles W. Clark
We investigate theoretically the properties of an ideal trapped gas in a time-dependent harmonic potential. Using a scaling formalism, we are able to present exact analytical results for two important classes of experiments: free expansion of the gas upon

Gapless Mean-Field Theory of Bose-Einstein Condensation

January 15, 2000
Author(s)
D A. Hutchinson, Karen G. Burnett, K Dodd, S A. Morgan, M Rusch, M Zaremba, N P. Proukakis, A Griffin, Mark A. Edwards, Charles W. Clark
We present a topical review of the development of finite-temperature field theories of Bose-Einstein condensation in weakly interacting atomic gases. We highlight the difficulties in obtaining a consistent finite-temperature theory that has a gapless
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