Relevance of sub-surface chip layers for the lifetime of magnetically trapped atoms

  • B. Zhang
  • C. Henkel
  • E. Haller
  • S. Wildermuth
  • S. Hofferberth
  • P. Krüger
  • J. SchmiedmayerEmail author
Novel Materials for Atom Chips


We investigate the lifetime of magnetically trapped atoms above a planar, layered atom chip structure. Numerical calculations of the thermal magnetic noise spectrum are performed, based on the exact magnetic Green function and multi layer reflection coefficients. We have performed lifetime measurements where the center of a side guide trap is laterally shifted with respect to the current carrying wire using additional bias fields. Comparing the experiment to theory, we find a fair agreement and demonstrate that for a chip whose topmost layer is metallic, the magnetic noise depends essentially on the thickness of that layer, as long as the layers below have a much smaller conductivity; essentially the same magnetic noise would be obtained with a metallic membrane suspended in vacuum. Based on our theory we give general scaling laws of how to reduce the effect of surface magnetic noise on the trapped atoms.


Reflection Coefficient Noise Spectrum Lifetime Measurement Bias Field Current Carry 
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  1. R. Folman, P. Krüger, J. Schmiedmayer, J. Denschlag, C. Henkel, Adv. Atom. Mol. Opt. Phys. 48, 263 (2002) Google Scholar
  2. J. Reichel, Appl. Phys. B 74, 469 (2002) CrossRefGoogle Scholar
  3. T.Calarco, E.A.Hinds, D.Jaksch, J.Schmiedmayer, J.I.Cirac, P.Zoller, Phys. Rev. A 61, 022304 (2000) CrossRefGoogle Scholar
  4. J. Schmiedmayer, R. Folman, T. Calarco, J. Mod. Optics, 49, 1375 (2002) Google Scholar
  5. Y. Wang et al., e-print arXiv:cond-mat/0407689 Google Scholar
  6. H.Ott, J.Fortagh, G.Schlotterbeck, A.Grossmann, C.Zimmermann, Phys. Rev. Lett. 87, 230401 (2001) Google Scholar
  7. W.Hänsel, P.Hommelhoff, T.W.Hänsch, J.Reichel, Nature 413, 498 (2001) CrossRefPubMedGoogle Scholar
  8. A.E.Leanhardt et al., Phys. Rev. Lett. 89, 040401 (2002) CrossRefPubMedGoogle Scholar
  9. S.Schneider et al., Phys. Rev. A 67, 023612 (2003) CrossRefGoogle Scholar
  10. C.D.J. Sinclair et al., e-print arXiv:cond-mat/0503619 (2005) Google Scholar
  11. P.K. Rekdal, S. Scheel, P.L. Knight, E.A. Hinds, Phys. Rev. A. 70, 013811 (2004); S. Scheel, P.K. Rekdal, P.L. Knight, E.A. Hinds, e-print arXiv:quant-ph/0501149. CrossRefGoogle Scholar
  12. D.M. Harber, J.M. Obrecht, E.A. Cornell, J. Low Temp. Phys. 133, 229 (2003) CrossRefGoogle Scholar
  13. C. Henkel, M. Wilkens, Europhys. Lett. 47, 414 (1999) CrossRefGoogle Scholar
  14. C. Henkel, S. Pötting, M. Wilkens, Appl. Phys. B 69, 379 (1999) CrossRefGoogle Scholar
  15. T. Varpula, T. Poutanen, J. Appl. Phys. 55, 4015 (1984) CrossRefGoogle Scholar
  16. Q.A. Turchette et al., Phys. Rev. A 61, 063418 (2000) CrossRefGoogle Scholar
  17. C. Henkel, S. Pötting, Appl. Phys. B 72, 73 (2001) Google Scholar
  18. C. Henkel, Eur. Phys. J. D 35, 59 (2005) Google Scholar
  19. G.S. Agarwal, Phys. Rev. A 11, 230 (1975) CrossRefGoogle Scholar
  20. P. Yeh, Optical Waves in Layered Media (John Wiley & Sons, New York, 1988) Google Scholar
  21. Y.-J. Lin, I. Teper, C. Chin, V. Vuletić, Phys. Rev. Lett. 92, 050404 (2004) Google Scholar
  22. S. Bauer, Am. J. Phys. 60, 257 (1992) Google Scholar
  23. A.E. Leanhardt, Y. Shin, A.P. Chikkatur, D. Kielpinski, W. Ketterle, D.E. Pritchard, Phys. Rev. Lett. 90, 100404 (2003) CrossRefPubMedGoogle Scholar
  24. J. Fortagh, H. Ott, S. Kraft, A. Günther, C. Zimmermann, Phys. Rev. A 66, 041604(R) (2002) CrossRefGoogle Scholar
  25. M.P.A. Jones, C.J. Vale, D. Sahagun, B.V. Hall, E.A. Hinds, Phys. Rev. Lett. 91, 080401 (2003) CrossRefPubMedGoogle Scholar
  26. S. Groth et al., Appl. Phys. Lett. 85, 2980 (2004) CrossRefGoogle Scholar
  27. S. Wildermuth et al., Phys. Rev. A 69, 030901(R) (2004) CrossRefGoogle Scholar
  28. E. Haller, Diploma thesis, Universität Heidelberg (2004) Google Scholar
  29. A. Haase et al., Phys. Rev. A 64, 043405 (2001) CrossRefGoogle Scholar
  30. J. Reichel, W. Hänsel, T.W. Hänsch, Phys. Rev. Lett. 83, 3398 (1999) CrossRefGoogle Scholar
  31. J. Estève, Ph.D. thesis, Université Paris 6 (2004) Google Scholar
  32. N.W. Ashcroft, N.D. Mermin, Solid State Physics (Saunders, Philadelphia, 1976) Google Scholar
  33. P. Krüger, Ph.D. thesis, Universität Heidelberg (2004), Google Scholar
  34. V. Dikovsky, Y. Japha, C. Henkel, R. Folman, Eur. Phys. J. D 35, 87 (2005) Google Scholar

Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2005

Authors and Affiliations

  • B. Zhang
    • 1
  • C. Henkel
    • 1
  • E. Haller
    • 2
  • S. Wildermuth
    • 2
  • S. Hofferberth
    • 2
  • P. Krüger
    • 2
  • J. Schmiedmayer
    • 2
    Email author
  1. 1.Institut für Physik, Universität PotsdamPotsdamGermany
  2. 2.Physikalisches Institut, Universität HeidelbergHeidelbergGermany

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