Atomic spin polarization by Raman cooling

Physical Review A - Atomic, Molecular, and Optical Physics

Volumn 57, Issue 4, 1998, Pages 2905-2908

  Lee, H J ^a   Chu, S ^a  

^a STANFORD UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 4243384057     PISSN: 10502947     EISSN: 10941622     Source Type: Journal    
DOI: 10.1103/PhysRevA.57.2905     Document Type: Article

References (20)

1. Many precision atom interferometers use only (Formula presented) transitions. See, for example, K. Gibble and S. Chu, Phys. Rev. Lett. 70, 1771 (1993); PRLTAO
2. Phys. Rev. Lett.D. S. Weiss, B. C. Young, and S. Chu, 70, 2706 (1993).
3. See, for example, H. M. J. M. Boesten et al, Phys. Rev. Lett. 77, 5194 (1997).PRLTAO
4. E. Tiesinga et al, Phys. Rev. A 46, R1167 (1992); PLRAAN
5. Phys. Rev. AE. Tiesinga, B. J. Verhaar, and H. T. C. Stoof, 47, 4114 (1993).
6. M. H. Anderson et al, Science 269, 198 (1995).SCIEAS
7. K. B. Davis et al, Phys. Rev. Lett. 75, 3969 (1995).PRLTAO
8. C. Bradley et al, Phys. Rev. Lett. 75, 1687 (1995).PRLTAO
9. For an example using microwave selection, see K. Gibble and S. Chu (Ref. 1).
10. M. Kasevich and S. Chu, Phys. Rev. Lett. 69, 1741 (1992).PRLTAO
11. H. J. Lee et al, Phys. Rev. Lett. 76, 2658 (1996).PRLTAO
12. Note that the alternative (Formula presented) configuration achieves a larger sublevel change, (Formula presented) but does not excite the (Formula presented) (Formula presented) state. In addition, the Rabi frequency for this transition tends to zero in the limit that the detuning is larger than the excited-state frequency separations.
13. W. Ketterle et al, Phys. Rev. Lett. 70, 2253 (1993).PRLTAO
14. In a trap, one-dimensional cooling can be performed with only one beam pair because of the oscillatory nature of the atoms. One beam pair schemes were observed to take longer to reach the same temperature with less atoms than the two beam pair switching scheme reported in this work.
15. For experimental convenience, we used the (Formula presented) π polarization configuration for one beam pair and the π (Formula presented) polarization configuration for the other. If only one polarization configuration is used for both beam pairs, access from four directions must be available for the Doppler sensitive beams, instead of 2.
16. 70 kHz corresponds to a velocity of (Formula presented) for orthogonal Raman beams.
17. Although the 210-kHz detuning is nearly identical in absolute frequency to the previously reported value in Ref. 9, the effective recoil detuning is (Formula presented) times further away.
18. The optical pumping beams were directed parallel and antiparallel to the bias field for these optical pumping cases.
19. For this polarization combination, there are no forbidden transitions for the (Formula presented) (Formula presented) to (Formula presented) (Formula presented) transition. In contrast, linear polarization, parallel to the bias field, must rely on (off resonant) excitation of the (Formula presented) (Formula presented) (Formula presented) to (Formula presented) (Formula presented) (Formula presented) transition in order to optical pump out of the (Formula presented) (Formula presented) (Formula presented) state. The (Formula presented) (Formula presented) (Formula presented) state has no matrix element to the (Formula presented) (Formula presented) (Formula presented) state.
20. Intensity of the probe beams was adjusted to drive a (Formula presented) pulse to ensure the response was in a linear regime. The (Formula presented) (Formula presented) transition has a factor of (Formula presented) larger Rabi frequency than the other two transitions.