@article{OehbergSurkovTittonenetal.1997,
  author    = {{\"O}hberg, P. and Surkov, E. L. and Tittonen, I. and Stenholm, Stig and Wilkens, Martin and Shlyapnikov, G. V.},
  title     = {Low-energy elementary excitations of a trapped Bose-condensed gas},
  year      = {1997},
  abstract  = {We develop a method of finding analytical sotutions of the Bogolyubov-de Gennes equations for the excitations of a Bose condensate in the Thomas-Fermi regime in harmonic traps of any asymmetry and introduce a classification of eigenstates. In the case of cylindrical symmetry we emphasize the presence of an accidental degeneracy in the excitation spectrum at certain values of the projection of orbital angular momentum on the symmetry axis and discuss possible consequences of the degeneracy in the context of new signatures of Bose- Einstein condensation},
  language  = {en}
}
@article{StenholmWilkens1997,
  author    = {Stenholm, Stig and Wilkens, Martin},
  title     = {Jumps in quantum theory},
  year      = {1997},
  abstract  = {In this paper we review the discussion about quantum jumps. We sketch the historical background before we present the recent revival of this problem originating in the field of atomic investigations. We present both the theoretical methods and their motivations, the relevance to experiments and an attempt at a preliminary discussion of the role of these developments in our fundamental understanding of quantum physics.},
  language  = {en}
}