Applied Physics B

, Volume 86, Issue 3, pp 385–390

Nonexponential decay of Bose–Einstein condensates: a numerical study based on the complex scaling method

Article

DOI: 10.1007/s00340-006-2511-8

Cite this article as:
Schlagheck, P. & Wimberger, S. Appl. Phys. B (2007) 86: 385. doi:10.1007/s00340-006-2511-8

Abstract

We study the decay dynamics of an interacting Bose–Einstein condensate in the presence of a metastable trapping potential from which the condensate can escape via tunneling through finite barriers. The time-dependent decay process is reproduced by means of the instantaneous decay rates of the condensate at a given population of the quasi-bound state, which are calculated with the method of complex scaling. Both for the case of a double-barrier potential as well as for the case of a tilted periodic potential, we find pronounced deviations from a monoexponential decay behavior, which would generally be expected in the absence of the atom–atom interaction.

Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  1. 1.Institut für Theoretische PhysikUniversität RegensburgRegensburgGermany
  2. 2.Dipartimento di Fisica Enrico Fermi and CNR-INFMUniversità degli Studi di PisaPisaItaly