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Blackbody radiation shift in the Sr optical atomic clock
M. S. Safronova, S. G. Porsev, U. I. Safronova +2
We evaluated the static and dynamic polarizabilities of the 5s^2 ^1S_0 and 5s5p ^3P_0^o states of Sr using the high-precision relativistic configuration interaction + all-order met…
Unconventional Spin Density Waves in Dipolar Fermi Gases
S. G. Bhongale, L. Mathey, Shan-Wen Tsai +2
The conventional spin density wave (SDW) phase (Overhauser, 1962), as found in antiferromagnetic metal for example (Fawcett 1988), can be described as a condensate of particle-hole…
Approximate mean-field equations of motion for quasi-2D Bose-Einstein condensate systems
Mark Edwards, Michael Krygier, Hadayat Seddiqi +2
We present a method for approximating the solution of the three-dimensional, time-dependent Gross-Pitaevskii equation (GPE) for Bose-Einstein condensate systems where the confineme…
Ytterbium in quantum gases and atomic clocks: van der Waals interactions and blackbody shifts
M. S. Safronova, S. G. Porsev, Charles W. Clark
We evaluated the C_6 coefficients of Yb-Yb and Yb -alkali/group II van der Waals interactions with 2% uncertainty. The only existing results for such quantities are for the Yb-Yb d…
Decay of a superfluid current of ultra-cold atoms in a toroidal trap
Amy C. Mathey, Charles W. Clark, L. Mathey
Using a numerical implementation of the truncated Wigner approximation, we simulate the experiment reported by Ramanathan et al. in Phys. Rev. Lett. 106, 130401 (2011), in which a…
Magic wavelengths for optical cooling and trapping of lithium
M. S. Safronova, U. I. Safronova, Charles W. Clark
Using first-principles calculations, we identify magic wavelengths for the 2s-2p and 2s-3p transitions in lithium. The ns and np atomic levels have the same ac Stark shifts at the…