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The European Physical Journal Special Topics

, Volume 217, Issue 1, pp 69–78 | Cite as

Bogoliubov theory on the disordered lattice

  • Christopher Gaul
  • Cord A. Müller
Regular Article

Abstract

Quantum fluctuations of Bose-Einstein condensates trapped in disordered lattices are studied by inhomogeneous Bogoliubov theory. Weak-disorder perturbation theory is applied to compute the elastic scattering rate as well as the renormalized speed of sound in lattices of arbitrary dimensionality. Furthermore, analytical results for the condensate depletion are presented, which are in good agreement with numerical data.

Keywords

European Physical Journal Special Topic Momentum Distribution Disorder Strength Condensate Fraction Energy Shell 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© EDP Sciences and Springer 2013

Authors and Affiliations

  1. 1.GISC, Departamento de Física de MaterialesUniversidad ComplutenseMadridSpain
  2. 2.CEI Campus MoncloaUCM-UPMMadridSpain
  3. 3.Centre for Quantum TechnologiesNational University of SingaporeSingaporeSingapore

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