Multifrequency evaporative cooling to Bose-Einstein condensation in a high magnetic field

Physical Review A - Atomic, Molecular, and Optical Physics

Volumn 62, Issue 2, 2000, Pages 4-

  Boyer, V ^a   Murdoch, S ^a   Le Coq, Y ^a   Delannoy, G ^a   Bouyer, P ^a   Aspect, A ^a  

^a UNIV PARIS SUD   (France)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 85037248904     PISSN: 10502947     EISSN: 10941622     Source Type: Journal    
DOI: 10.1103/PhysRevA.62.021601     Document Type: Article

References (20)

1. W. Ketterle and N.J. Druten, Adv. At., Mol., Opt. Phys. 37, 181 (1996), and references therein.
2. O.J. Luiten, M.W. Reynolds, and J.T.M. Walraven, Phys. Rev. A 53, 381 (1996);
3. J. Walraven, Quantum Dynamics of Simple Systems, Proceedings of the (Formula presented)Scottish University Summer School in Physics, Stirling, 1996, edited by G-L. Oppo (IOP, Bristol, 1996).
4. M.H. Anderson, J.R. Ensher, M.R. Matthews, C.E. Wieman, and E.A. Cornell, Science 269, 198 (1995).
5. C.C. Bradley, C.A. Sackett, J.J. Tollett, and R.G. Hulet, Phys. Rev. Lett. 75, 1687 (1995);
6. Phys. Rev. Lett.C.C. Bradley, 78, 985 (1997).
7. K.B. Davis, M.-O. Mewes, M.R. Andrews, N.J. van Druten, D.S. Durfee, D.M. Kurn, and W. Ketterle, Phys. Rev. Lett. 75, 3969 (1995).
8. B. Desruelle, V. Boyer, S.G. Murdoch, G. Delannoy, P. Bouyer, and A. Aspect, Phys. Rev. A 60, R1759 (1999).
9. O.H. Pakarinen and K.-A. Suominen, e-print physics/9910043(1999).
10. J.J. Tollett, C.C. Bradley, C.A. Sackett, and R.G. Hulet, Phys. Rev. A 51, R22 (1995).
11. B. Desruelle, V. Boyer, P. Bouyer, G. Birkl, M. Lécrivain, F. Alves, C.I. Westbrook, and A. Aspect, Eur. Phys. J. D 1, 255 (1998).
12. J. Stenger, S. Inouye, M.R. Andrews, H.-J. Miesner, D.M. Stamper-Kurn, and W. Ketterle, Phys. Rev. Lett. 82, 2422 (1999).
13. Vladan Vuletic, Andrew J. Kerman, Cheng Chin, and Steven Chu, Phys. Rev. Lett. 82, 1406 (1999).
14. Ph. Courteille, R.S. Freeland, D.J. Heinzen, F.A. van Abeelen, and B.J. Verhaar, Phys. Rev. Lett. 81, 69 (1998).
15. S. L. Cornish, N. R. Claussen, J. L. Roberts, E. A. Cornell, and C. E. Wieman, e-print physics/0004290.
16. Note, however, that in time-averaged orbiting potential traps the bias field often exceeds 10 G, and hindered cooling may play a role, specially when the atomic ground-state hyperfine splitting is relatively small, as in sodium, for example.
17. P. Bouyer, V. Boyer, S.G. Murdoch, G. Delannoy, Y. Le Coq, A. Aspect, and M. Lecrivain, e-print physics/0003050.
18. The (Formula presented) state is a trapping state in this manifold because of the nonlinearity of the Zeeman effect.
19. This conclusion was corroborated by a calculation of the energies of the dressed states for a given set (Formula presented) From the calculated energy splitting (Formula presented) at the (Formula presented) level crossing, we used the two-level Landau-Zener probability that the atoms will follow an adiabatic transition. We verified that for small Rabi frequencies (i.e., small evaporation efficiency), as in our experiment, this three-photon transition is the most probable transition at any sideband detuning (Formula presented) This numerical calculation can be used to fit the experimental data. We can estimate the one-photon Rabi frequency (Formula presented) kHz.
20. Except maybe for the case of destructive energy releasing collisions as in (Formula presented) See P.S. Julienne, F.H. Mies, E. Tiesinga, and C.J. Williams, Phys. Rev. Lett. 78, 1880 (1997).