Berlin 2014 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 42: Quantum gases: Disorder- or interaction-induced effects
Q 42.4: Talk
Thursday, March 20, 2014, 15:00–15:15, UDL HS2002
Localization of Bogoliubov excitations — •Christopher Gaul1, Pierre Lugan2, and Cord A Müller3 — 1Max-Planck-Institut für Physik Komplexer Systeme, D-01187 Dresden — 2Laboratory of Theoretical Physics of Nanosystems, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland — 3Fachbereich Physik, Universität Konstanz, D-78457 Konstanz
We study the localization of Bogoliubov excitations of disordered Bose-Einstein condensates in one-dimensional and quasi–one-dimensional geometries. We present numerical results for the localization length based on a transfer-matrix approach and finite-size scaling. We discuss the results as function of the excitation energy and confront them with analytical results [Gaul & Müller, Phys. Rev. A 83, 063629 (2011)] on the scattering mean free path and the transport mean free path.