Abstract

Using forced radio-frequency evaporation, we have cooled cesium atoms prepared in the sublevel F = -mF = 3 and confined in a magnetic trap. At the end of the evaporation ramp, the sample contains ~ 7000 atoms at 80 nK, corresponding to a phase space density 3 × 10-2. A molecular dynamics approach, including the effect of gravity, gives a good account for the experimental data, assuming a scattering length larger than 300 Å.

© 1998 Optical Society of America

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  1. M. H. Anderson, J. R. Ensher, M. R. Matthews, C. E. Wieman, and E. A. Cornell, Science 269, 1989 (1995).
  2. C. C. Bradley, C. A. Sackett, and R. G. Hulet, Phys. Rev. Lett. 78, 985 (1997).
    [CrossRef]
  3. C. C. Bradley, C. A. Sackett, J. J. Tollet, and R. G. Hulet, Phys. Rev. Lett. 75, 1687 (1995).
    [CrossRef] [PubMed]
  4. 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).
    [CrossRef] [PubMed]
  5. M. R. Andrews, C. G. Townsend, H.-J. Miesner, D. S. Durfee, D. M. Kurn, and W. Ketterle, Science 275, 737 (1997).
    [CrossRef]
  6. E. A. Burt, R. W. Ghrist, C. J. Myatt, M. J. Holland, E. A. Cornell, and C. E. Wieman, Phys. Rev. Lett. 79, 337 (1997).
    [CrossRef]
  7. J. Söding, D. Guéry-Odelin, P. Desbiolles, G. Ferrari, and J. Dalibard, accepted for publication in Phys. Rev. Lett.
  8. A. Steane, P. Szriftgiser, P. Desbiolles, and J. Dalibard, Phys. Rev. Lett. 74, 4972 (1995).
    [CrossRef] [PubMed]
  9. H. F. Hess, Bull. Am. Phys. Soc. [2] 30, 854 (1985).
  10. O. J. Luiten, M. W. Reynolds, and J. T. M. Walraven, Phys. Rev. A 53, 381 (1996).
    [CrossRef] [PubMed]
  11. E. L. Surkov, J. T. M. Walraven, and G. V. Shlyapnikov, Phys. Rev. A 53, 3403 (1996).
    [CrossRef] [PubMed]
  12. W. Ketterle and N.J. van Druten, Adv. At. Mol. Opt. Phys. 37, 181 (1996).
    [CrossRef]
  13. H. Wu and C. Foot, J. Phys. B,  29, L321–L328 (1996).
    [CrossRef]
  14. L. D. Landau and E. M. Lifshitz, Quantum Mechanics (Pergamon Press, Oxford, 1977), Sect. 143.
  15. C. J. Joachain, Quantum collision theory, (North-Holland, Amsterdam, 1983) pp. 78–105
  16. M. Arndt, M. Ben Dahan, D. Guéry-Odelin, M. W. Reynolds, and J. Dalibard, Phys. Rev. Lett. 79, 625 (1997).
    [CrossRef]
  17. A. Fioretti, D. Comparat, A. Crubellier, O. Dulieu, F. Masnou-Seeuws, and P. Pillet, preprint (November 1997).
  18. A. Kastberg, W. D. Phillips, S. L. Rolston, and R. J. C. Spreeuw, Phys. Rev. Lett. 74, 1542 (1995).
    [CrossRef] [PubMed]
  19. D. Boiron, A. Michaud, P. Lemonde, Y. Castin, C. Salomon, S. Weyers, K. Szymaniec, L. Cognet, and A. Clairon, Phys. Rev. A 53, R3734 (1996).
    [CrossRef] [PubMed]

1997 (4)

M. R. Andrews, C. G. Townsend, H.-J. Miesner, D. S. Durfee, D. M. Kurn, and W. Ketterle, Science 275, 737 (1997).
[CrossRef]

E. A. Burt, R. W. Ghrist, C. J. Myatt, M. J. Holland, E. A. Cornell, and C. E. Wieman, Phys. Rev. Lett. 79, 337 (1997).
[CrossRef]

C. C. Bradley, C. A. Sackett, and R. G. Hulet, Phys. Rev. Lett. 78, 985 (1997).
[CrossRef]

M. Arndt, M. Ben Dahan, D. Guéry-Odelin, M. W. Reynolds, and J. Dalibard, Phys. Rev. Lett. 79, 625 (1997).
[CrossRef]

1996 (5)

D. Boiron, A. Michaud, P. Lemonde, Y. Castin, C. Salomon, S. Weyers, K. Szymaniec, L. Cognet, and A. Clairon, Phys. Rev. A 53, R3734 (1996).
[CrossRef] [PubMed]

O. J. Luiten, M. W. Reynolds, and J. T. M. Walraven, Phys. Rev. A 53, 381 (1996).
[CrossRef] [PubMed]

E. L. Surkov, J. T. M. Walraven, and G. V. Shlyapnikov, Phys. Rev. A 53, 3403 (1996).
[CrossRef] [PubMed]

W. Ketterle and N.J. van Druten, Adv. At. Mol. Opt. Phys. 37, 181 (1996).
[CrossRef]

H. Wu and C. Foot, J. Phys. B,  29, L321–L328 (1996).
[CrossRef]

1995 (5)

A. Steane, P. Szriftgiser, P. Desbiolles, and J. Dalibard, Phys. Rev. Lett. 74, 4972 (1995).
[CrossRef] [PubMed]

M. H. Anderson, J. R. Ensher, M. R. Matthews, C. E. Wieman, and E. A. Cornell, Science 269, 1989 (1995).

A. Kastberg, W. D. Phillips, S. L. Rolston, and R. J. C. Spreeuw, Phys. Rev. Lett. 74, 1542 (1995).
[CrossRef] [PubMed]

C. C. Bradley, C. A. Sackett, J. J. Tollet, and R. G. Hulet, Phys. Rev. Lett. 75, 1687 (1995).
[CrossRef] [PubMed]

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).
[CrossRef] [PubMed]

1985 (1)

H. F. Hess, Bull. Am. Phys. Soc. [2] 30, 854 (1985).

Anderson, M. H.

M. H. Anderson, J. R. Ensher, M. R. Matthews, C. E. Wieman, and E. A. Cornell, Science 269, 1989 (1995).

Andrews, M. R.

M. R. Andrews, C. G. Townsend, H.-J. Miesner, D. S. Durfee, D. M. Kurn, and W. Ketterle, Science 275, 737 (1997).
[CrossRef]

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).
[CrossRef] [PubMed]

Arndt, M.

M. Arndt, M. Ben Dahan, D. Guéry-Odelin, M. W. Reynolds, and J. Dalibard, Phys. Rev. Lett. 79, 625 (1997).
[CrossRef]

Ben Dahan, M.

M. Arndt, M. Ben Dahan, D. Guéry-Odelin, M. W. Reynolds, and J. Dalibard, Phys. Rev. Lett. 79, 625 (1997).
[CrossRef]

Boiron, D.

D. Boiron, A. Michaud, P. Lemonde, Y. Castin, C. Salomon, S. Weyers, K. Szymaniec, L. Cognet, and A. Clairon, Phys. Rev. A 53, R3734 (1996).
[CrossRef] [PubMed]

Bradley, C. C.

C. C. Bradley, C. A. Sackett, and R. G. Hulet, Phys. Rev. Lett. 78, 985 (1997).
[CrossRef]

C. C. Bradley, C. A. Sackett, J. J. Tollet, and R. G. Hulet, Phys. Rev. Lett. 75, 1687 (1995).
[CrossRef] [PubMed]

Burt, E. A.

E. A. Burt, R. W. Ghrist, C. J. Myatt, M. J. Holland, E. A. Cornell, and C. E. Wieman, Phys. Rev. Lett. 79, 337 (1997).
[CrossRef]

Castin, Y.

D. Boiron, A. Michaud, P. Lemonde, Y. Castin, C. Salomon, S. Weyers, K. Szymaniec, L. Cognet, and A. Clairon, Phys. Rev. A 53, R3734 (1996).
[CrossRef] [PubMed]

Clairon, A.

D. Boiron, A. Michaud, P. Lemonde, Y. Castin, C. Salomon, S. Weyers, K. Szymaniec, L. Cognet, and A. Clairon, Phys. Rev. A 53, R3734 (1996).
[CrossRef] [PubMed]

Cognet, L.

D. Boiron, A. Michaud, P. Lemonde, Y. Castin, C. Salomon, S. Weyers, K. Szymaniec, L. Cognet, and A. Clairon, Phys. Rev. A 53, R3734 (1996).
[CrossRef] [PubMed]

Comparat, D.

A. Fioretti, D. Comparat, A. Crubellier, O. Dulieu, F. Masnou-Seeuws, and P. Pillet, preprint (November 1997).

Cornell, E. A.

E. A. Burt, R. W. Ghrist, C. J. Myatt, M. J. Holland, E. A. Cornell, and C. E. Wieman, Phys. Rev. Lett. 79, 337 (1997).
[CrossRef]

M. H. Anderson, J. R. Ensher, M. R. Matthews, C. E. Wieman, and E. A. Cornell, Science 269, 1989 (1995).

Crubellier, A.

A. Fioretti, D. Comparat, A. Crubellier, O. Dulieu, F. Masnou-Seeuws, and P. Pillet, preprint (November 1997).

Dalibard, J.

M. Arndt, M. Ben Dahan, D. Guéry-Odelin, M. W. Reynolds, and J. Dalibard, Phys. Rev. Lett. 79, 625 (1997).
[CrossRef]

A. Steane, P. Szriftgiser, P. Desbiolles, and J. Dalibard, Phys. Rev. Lett. 74, 4972 (1995).
[CrossRef] [PubMed]

J. Söding, D. Guéry-Odelin, P. Desbiolles, G. Ferrari, and J. Dalibard, accepted for publication in Phys. Rev. Lett.

Davis, K. B.

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).
[CrossRef] [PubMed]

Desbiolles, P.

A. Steane, P. Szriftgiser, P. Desbiolles, and J. Dalibard, Phys. Rev. Lett. 74, 4972 (1995).
[CrossRef] [PubMed]

J. Söding, D. Guéry-Odelin, P. Desbiolles, G. Ferrari, and J. Dalibard, accepted for publication in Phys. Rev. Lett.

Dulieu, O.

A. Fioretti, D. Comparat, A. Crubellier, O. Dulieu, F. Masnou-Seeuws, and P. Pillet, preprint (November 1997).

Durfee, D. S.

M. R. Andrews, C. G. Townsend, H.-J. Miesner, D. S. Durfee, D. M. Kurn, and W. Ketterle, Science 275, 737 (1997).
[CrossRef]

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).
[CrossRef] [PubMed]

Ensher, J. R.

M. H. Anderson, J. R. Ensher, M. R. Matthews, C. E. Wieman, and E. A. Cornell, Science 269, 1989 (1995).

Ferrari, G.

J. Söding, D. Guéry-Odelin, P. Desbiolles, G. Ferrari, and J. Dalibard, accepted for publication in Phys. Rev. Lett.

Fioretti, A.

A. Fioretti, D. Comparat, A. Crubellier, O. Dulieu, F. Masnou-Seeuws, and P. Pillet, preprint (November 1997).

Foot, C.

H. Wu and C. Foot, J. Phys. B,  29, L321–L328 (1996).
[CrossRef]

Ghrist, R. W.

E. A. Burt, R. W. Ghrist, C. J. Myatt, M. J. Holland, E. A. Cornell, and C. E. Wieman, Phys. Rev. Lett. 79, 337 (1997).
[CrossRef]

Guéry-Odelin, D.

M. Arndt, M. Ben Dahan, D. Guéry-Odelin, M. W. Reynolds, and J. Dalibard, Phys. Rev. Lett. 79, 625 (1997).
[CrossRef]

J. Söding, D. Guéry-Odelin, P. Desbiolles, G. Ferrari, and J. Dalibard, accepted for publication in Phys. Rev. Lett.

Hess, H. F.

H. F. Hess, Bull. Am. Phys. Soc. [2] 30, 854 (1985).

Holland, M. J.

E. A. Burt, R. W. Ghrist, C. J. Myatt, M. J. Holland, E. A. Cornell, and C. E. Wieman, Phys. Rev. Lett. 79, 337 (1997).
[CrossRef]

Hulet, R. G.

C. C. Bradley, C. A. Sackett, and R. G. Hulet, Phys. Rev. Lett. 78, 985 (1997).
[CrossRef]

C. C. Bradley, C. A. Sackett, J. J. Tollet, and R. G. Hulet, Phys. Rev. Lett. 75, 1687 (1995).
[CrossRef] [PubMed]

Joachain, C. J.

C. J. Joachain, Quantum collision theory, (North-Holland, Amsterdam, 1983) pp. 78–105

Kastberg, A.

A. Kastberg, W. D. Phillips, S. L. Rolston, and R. J. C. Spreeuw, Phys. Rev. Lett. 74, 1542 (1995).
[CrossRef] [PubMed]

Ketterle, W.

M. R. Andrews, C. G. Townsend, H.-J. Miesner, D. S. Durfee, D. M. Kurn, and W. Ketterle, Science 275, 737 (1997).
[CrossRef]

W. Ketterle and N.J. van Druten, Adv. At. Mol. Opt. Phys. 37, 181 (1996).
[CrossRef]

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).
[CrossRef] [PubMed]

Kurn, D. M.

M. R. Andrews, C. G. Townsend, H.-J. Miesner, D. S. Durfee, D. M. Kurn, and W. Ketterle, Science 275, 737 (1997).
[CrossRef]

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).
[CrossRef] [PubMed]

Landau, L. D.

L. D. Landau and E. M. Lifshitz, Quantum Mechanics (Pergamon Press, Oxford, 1977), Sect. 143.

Lemonde, P.

D. Boiron, A. Michaud, P. Lemonde, Y. Castin, C. Salomon, S. Weyers, K. Szymaniec, L. Cognet, and A. Clairon, Phys. Rev. A 53, R3734 (1996).
[CrossRef] [PubMed]

Lifshitz, E. M.

L. D. Landau and E. M. Lifshitz, Quantum Mechanics (Pergamon Press, Oxford, 1977), Sect. 143.

Luiten, O. J.

O. J. Luiten, M. W. Reynolds, and J. T. M. Walraven, Phys. Rev. A 53, 381 (1996).
[CrossRef] [PubMed]

Masnou-Seeuws, F.

A. Fioretti, D. Comparat, A. Crubellier, O. Dulieu, F. Masnou-Seeuws, and P. Pillet, preprint (November 1997).

Matthews, M. R.

M. H. Anderson, J. R. Ensher, M. R. Matthews, C. E. Wieman, and E. A. Cornell, Science 269, 1989 (1995).

Mewes, M.-O.

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).
[CrossRef] [PubMed]

Michaud, A.

D. Boiron, A. Michaud, P. Lemonde, Y. Castin, C. Salomon, S. Weyers, K. Szymaniec, L. Cognet, and A. Clairon, Phys. Rev. A 53, R3734 (1996).
[CrossRef] [PubMed]

Miesner, H.-J.

M. R. Andrews, C. G. Townsend, H.-J. Miesner, D. S. Durfee, D. M. Kurn, and W. Ketterle, Science 275, 737 (1997).
[CrossRef]

Myatt, C. J.

E. A. Burt, R. W. Ghrist, C. J. Myatt, M. J. Holland, E. A. Cornell, and C. E. Wieman, Phys. Rev. Lett. 79, 337 (1997).
[CrossRef]

Phillips, W. D.

A. Kastberg, W. D. Phillips, S. L. Rolston, and R. J. C. Spreeuw, Phys. Rev. Lett. 74, 1542 (1995).
[CrossRef] [PubMed]

Pillet, P.

A. Fioretti, D. Comparat, A. Crubellier, O. Dulieu, F. Masnou-Seeuws, and P. Pillet, preprint (November 1997).

Reynolds, M. W.

M. Arndt, M. Ben Dahan, D. Guéry-Odelin, M. W. Reynolds, and J. Dalibard, Phys. Rev. Lett. 79, 625 (1997).
[CrossRef]

O. J. Luiten, M. W. Reynolds, and J. T. M. Walraven, Phys. Rev. A 53, 381 (1996).
[CrossRef] [PubMed]

Rolston, S. L.

A. Kastberg, W. D. Phillips, S. L. Rolston, and R. J. C. Spreeuw, Phys. Rev. Lett. 74, 1542 (1995).
[CrossRef] [PubMed]

Sackett, C. A.

C. C. Bradley, C. A. Sackett, and R. G. Hulet, Phys. Rev. Lett. 78, 985 (1997).
[CrossRef]

C. C. Bradley, C. A. Sackett, J. J. Tollet, and R. G. Hulet, Phys. Rev. Lett. 75, 1687 (1995).
[CrossRef] [PubMed]

Salomon, C.

D. Boiron, A. Michaud, P. Lemonde, Y. Castin, C. Salomon, S. Weyers, K. Szymaniec, L. Cognet, and A. Clairon, Phys. Rev. A 53, R3734 (1996).
[CrossRef] [PubMed]

Shlyapnikov, G. V.

E. L. Surkov, J. T. M. Walraven, and G. V. Shlyapnikov, Phys. Rev. A 53, 3403 (1996).
[CrossRef] [PubMed]

Söding, J.

J. Söding, D. Guéry-Odelin, P. Desbiolles, G. Ferrari, and J. Dalibard, accepted for publication in Phys. Rev. Lett.

Spreeuw, R. J. C.

A. Kastberg, W. D. Phillips, S. L. Rolston, and R. J. C. Spreeuw, Phys. Rev. Lett. 74, 1542 (1995).
[CrossRef] [PubMed]

Steane, A.

A. Steane, P. Szriftgiser, P. Desbiolles, and J. Dalibard, Phys. Rev. Lett. 74, 4972 (1995).
[CrossRef] [PubMed]

Surkov, E. L.

E. L. Surkov, J. T. M. Walraven, and G. V. Shlyapnikov, Phys. Rev. A 53, 3403 (1996).
[CrossRef] [PubMed]

Szriftgiser, P.

A. Steane, P. Szriftgiser, P. Desbiolles, and J. Dalibard, Phys. Rev. Lett. 74, 4972 (1995).
[CrossRef] [PubMed]

Szymaniec, K.

D. Boiron, A. Michaud, P. Lemonde, Y. Castin, C. Salomon, S. Weyers, K. Szymaniec, L. Cognet, and A. Clairon, Phys. Rev. A 53, R3734 (1996).
[CrossRef] [PubMed]

Tollet, J. J.

C. C. Bradley, C. A. Sackett, J. J. Tollet, and R. G. Hulet, Phys. Rev. Lett. 75, 1687 (1995).
[CrossRef] [PubMed]

Townsend, C. G.

M. R. Andrews, C. G. Townsend, H.-J. Miesner, D. S. Durfee, D. M. Kurn, and W. Ketterle, Science 275, 737 (1997).
[CrossRef]

van Druten, N. J.

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).
[CrossRef] [PubMed]

van Druten, N.J.

W. Ketterle and N.J. van Druten, Adv. At. Mol. Opt. Phys. 37, 181 (1996).
[CrossRef]

Walraven, J. T. M.

E. L. Surkov, J. T. M. Walraven, and G. V. Shlyapnikov, Phys. Rev. A 53, 3403 (1996).
[CrossRef] [PubMed]

O. J. Luiten, M. W. Reynolds, and J. T. M. Walraven, Phys. Rev. A 53, 381 (1996).
[CrossRef] [PubMed]

Weyers, S.

D. Boiron, A. Michaud, P. Lemonde, Y. Castin, C. Salomon, S. Weyers, K. Szymaniec, L. Cognet, and A. Clairon, Phys. Rev. A 53, R3734 (1996).
[CrossRef] [PubMed]

Wieman, C. E.

E. A. Burt, R. W. Ghrist, C. J. Myatt, M. J. Holland, E. A. Cornell, and C. E. Wieman, Phys. Rev. Lett. 79, 337 (1997).
[CrossRef]

M. H. Anderson, J. R. Ensher, M. R. Matthews, C. E. Wieman, and E. A. Cornell, Science 269, 1989 (1995).

Wu, H.

H. Wu and C. Foot, J. Phys. B,  29, L321–L328 (1996).
[CrossRef]

Adv. At. Mol. Opt. Phys. (1)

W. Ketterle and N.J. van Druten, Adv. At. Mol. Opt. Phys. 37, 181 (1996).
[CrossRef]

Bull. Am. Phys. Soc. [2] (1)

H. F. Hess, Bull. Am. Phys. Soc. [2] 30, 854 (1985).

J. Phys. B (1)

H. Wu and C. Foot, J. Phys. B,  29, L321–L328 (1996).
[CrossRef]

Phys. Rev. A (3)

O. J. Luiten, M. W. Reynolds, and J. T. M. Walraven, Phys. Rev. A 53, 381 (1996).
[CrossRef] [PubMed]

E. L. Surkov, J. T. M. Walraven, and G. V. Shlyapnikov, Phys. Rev. A 53, 3403 (1996).
[CrossRef] [PubMed]

D. Boiron, A. Michaud, P. Lemonde, Y. Castin, C. Salomon, S. Weyers, K. Szymaniec, L. Cognet, and A. Clairon, Phys. Rev. A 53, R3734 (1996).
[CrossRef] [PubMed]

Phys. Rev. Lett. (7)

A. Kastberg, W. D. Phillips, S. L. Rolston, and R. J. C. Spreeuw, Phys. Rev. Lett. 74, 1542 (1995).
[CrossRef] [PubMed]

M. Arndt, M. Ben Dahan, D. Guéry-Odelin, M. W. Reynolds, and J. Dalibard, Phys. Rev. Lett. 79, 625 (1997).
[CrossRef]

C. C. Bradley, C. A. Sackett, and R. G. Hulet, Phys. Rev. Lett. 78, 985 (1997).
[CrossRef]

C. C. Bradley, C. A. Sackett, J. J. Tollet, and R. G. Hulet, Phys. Rev. Lett. 75, 1687 (1995).
[CrossRef] [PubMed]

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).
[CrossRef] [PubMed]

E. A. Burt, R. W. Ghrist, C. J. Myatt, M. J. Holland, E. A. Cornell, and C. E. Wieman, Phys. Rev. Lett. 79, 337 (1997).
[CrossRef]

A. Steane, P. Szriftgiser, P. Desbiolles, and J. Dalibard, Phys. Rev. Lett. 74, 4972 (1995).
[CrossRef] [PubMed]

Science (2)

M. H. Anderson, J. R. Ensher, M. R. Matthews, C. E. Wieman, and E. A. Cornell, Science 269, 1989 (1995).

M. R. Andrews, C. G. Townsend, H.-J. Miesner, D. S. Durfee, D. M. Kurn, and W. Ketterle, Science 275, 737 (1997).
[CrossRef]

Other (4)

J. Söding, D. Guéry-Odelin, P. Desbiolles, G. Ferrari, and J. Dalibard, accepted for publication in Phys. Rev. Lett.

A. Fioretti, D. Comparat, A. Crubellier, O. Dulieu, F. Masnou-Seeuws, and P. Pillet, preprint (November 1997).

L. D. Landau and E. M. Lifshitz, Quantum Mechanics (Pergamon Press, Oxford, 1977), Sect. 143.

C. J. Joachain, Quantum collision theory, (North-Holland, Amsterdam, 1983) pp. 78–105

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Figures (5)

Figure 1.
Figure 1.

(a) Three-coil configuration for the magnetic trap. The two opposite coils are also used for the MOT. (b) Two extra Helmholtz coils are used to compress the atomic cloud in the xz plane.

Figure 2.
Figure 2.

Time of flight analysis: the atoms are released from the magnetic trap at time τ = 0. We deduce the temperature from the vertical expansion of the cloud.

Figure 3.
Figure 3.

Evolution of (a) the number of atoms and (b) the temperature during the 10 last seconds of the evaporation ramp. Experimental data: ☐, numerical simulation: continuous line (|a| = 1000 Å), dashed line (|a| = 100 Å).

Figure 4.
Figure 4.

Series of pictures taken t seconds after the start of a 30 seconds linear evaporation ramp.

Figure 5.
Figure 5.

Evolution of the atomic phase space density during the 10 last seconds of the evaporation ramp. Experimental data: ☐, numerical simulation: continuous line (|a| = 1000 Å), dashed line (|a| = 100 Å).

Tables (1)

Tables Icon

Table 1. Predictions of the numerical simulation for the result of the evaporation, for various scattering lengths.

Equations (5)

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W ( z ) = 3 μ 4 B 0 2 + b 2 z 2 + mgz
z 0 = ( ( 1 ) 1 2 ) B 0 b ,
μ 4 B 0 2 + b 2 z 2 =
B 0 = 4 h ν 0 μ ( 1 2 ) 1 2
σ ( k ) = 8 π a 2 1 + k 2 a 2 ,

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