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Q: Fachverband Quantenoptik und Photonik

Q 42: Quantum gases: Disorder- or interaction-induced effects

Q 42.4: Vortrag

Donnerstag, 20. März 2014, 15:00–15:15, UDL HS2002

Localization of Bogoliubov excitations — •Christopher Gaul1, Pierre Lugan2, and Cord A Müller31Max-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.

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DPG-Physik > DPG-Verhandlungen > 2014 > Berlin