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Author: charles clark

Displaying records 221 to 224.
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221. Blackbody Radiation Shift in a ^u43^Ca^u+^ Ion Optical Frequency Standard
Published: Date unknown
Authors: B Arora, M S Safronova, Charles W Clark
Abstract: Motivated by the prospect of an optical frequency standard based on 43Ca+, we calculate the blackbody radiation (BBR) shift of the 4s1/2 - 3d5/2 clock transition, which is a major component of the uncertainty budget. The calculations are based on the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=840268

222. Lifshitz-Like Transition and Enhancement of Correlations in a Rotating Bosonic Ring Lattice
Published: Date unknown
Authors: A M. Rey, Karen G. Burnett, Indubala Indradev Satija, Charles W Clark
Abstract: We study the effects of rotation on one-dimensional ultra-cold bosons confined to a ring lattice. For commensurate systems, at a critical value of the rotation frequency, an infinitesimal interatomic interaction energy opens a gap in the excitation ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=840253

223. Non-quantization of Current in an Annular Bose-Einstein Condensate
Published: Date unknown
Authors: D L Feder, L A Collins, Charles W Clark
Abstract: The circulating states of a Bose-Einstein condensate confined in an annulus are investigated both analytically and numerically. It is demonstrated that while single-valuedness of the condensate wavefunction ensures the quantization of circulation in ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841522

224. Vortices, Rings, and Spherical Shells in Bose-Einstein Condensates. I. Case of Repulsive Nonlinearity
Published: Date unknown
Authors: L D Carr, Charles W Clark
Abstract: The stationary behavior of axisymmetric vortex and vortex-like states of a Bose-Einstein condensate are described numerically and analytically. Both extended and con?ned condensates are considered in the context of the nonlinear Schrodinger equation, ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=840195



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