Sodium Bose-Einstein Condensates in the F=2 State in a Large-volume Optical Trap

Details Sodium Bose-Einstein Condensates in the F=2 State in a Large-volume Optical Trap Sodium Bose-Einstein Condensates in the F=2 State in a Large-volume Optical Trap

2002-08-20

arxiv.org/abs/cond-mat/0208385v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 3figures

Scientific paper

10.1103/PhysRevLett.90.090401

We have investigated the properties of Bose-Einstein condensates of sodium atoms in the upper hyperfine ground state in a purely optical trap. Condensates in the high-field seeking $| F=2, m_F=-2>$ state were created from initially prepared $| F=1,m_F=-1>$ condensates using a one-photon microwave transition at 1.77 GHz. The condensates were stored in a large-volume optical trap created by a single laser beam with an elliptical focus. We found condensates in the stretched state $| F=2, m_F=-2>$ to be stable for several seconds at densities in the range of $10^{14}$ atoms/cm$^{3}$. In addition, we studied the clock transition $| F=1, m_F=0>$ $\to$ $| F=2, m_F=0>$ in a sodium Bose-Einstein condensate and determined a density-dependent frequency shift of $(2.44\pm 0.25) \times 10^{-12}$ Hz cm$^{3}$.

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