@article{NegrettiHenkel2004,
  author    = {Negretti, Antonio and Henkel, Carsten},
  title     = {Enhanced phase sensitivity and soliton formation in an integrated BEC interferometer},
  issn      = {0953-4075},
  year      = {2004},
  abstract  = {We study the dynamics of Bose-Einstein condensates in time-dependent microtraps for the purpose of understanding the influence of the mean field interaction on the performance of interferometers. We identify conditions where the nonlinearity due to atom interactions increases the sensitivity of interferometers to a phase shift. This feature is connected with the adiabatic generation of a dark soliton. We analyse the robustness of this phenomenon with respect to thermal fluctuations, due to excited near fields in an electromagnetic surface trap},
  language  = {en}
}
@article{HenkelGardinerNegretti2004,
  author    = {Henkel, Carsten and Gardiner, Simon A. and Negretti, Antonio},
  title     = {(De)coherence physics with condensates in microtraps},
  issn      = {1054-660X},
  year      = {2004},
  abstract  = {We discuss the dynamics of a condensate in a miniaturized electromagnetic trap formed above a microstructured substrate. Recent experiments have found that trap lifetimes get reduced when approaching the substrate because atoms couple to thermally excited near fields. The data agree quantitatively with our theory [Appl. Phys. B 69, 379 (1999)]. We focus on the decoherence of a quantum degenerate gas in a quasi-one-dimensional trap. Monte Carlo simulations indicate that atom interactions reduce the condensate decoherence rate. This is explained by a simple theory in terms of the suppression of long-wavelength excitations. We present preliminary simulation results for the adiabatic generation of dark solitons},
  language  = {en}
}