Hannover 2010 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 69: Ultra-Cold Atoms, Ions and BEC IV / Interaction with VUV and X-Ray Light II (with A)
Q 69.4: Vortrag
Freitag, 12. März 2010, 14:45–15:00, F 303
One-dimensional Anderson localization in correlated random potentials — •Pierre Lugan1, Alain Aspect1, Laurent Sanchez-Palencia1, Dominique Delande2, Benoit Grémaud2,3, Cord A. Müller2,4, and Christian Miniatura3,5 — 1Laboratoire Charles Fabry de l'Institut d'Optique, CNRS and Univ. Paris-Sud, Campus Polytechnique, RD 128, F-91127 Palaiseau Cedex, France — 2Laboratoire Kastler-Brossel, UPMC, ENS, CNRS, 4 Place Jussieu, F-75005 Paris, France — 3Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, Singapore 117543, Singapore — 4Physikalisches Institut, Universität Bayreuth, D-95440 Bayreuth, Germany — 5Institut Non Linéaire de Nice, UNS, CNRS, 1361 Route des Lucioles, F-06560 Valbonne, France
The study of disorder with ultracold atomic gases has recently attracted much attention due to the possibility of controlling disorder, interactions, and dimensionality in these systems. In this contribution, we study the Anderson localization of ultracold atoms in weak, correlated one-dimensional potentials, and we discuss how the special long-range correlations present in the speckle potentials used in current experiments affect the localization properties of single particles and non-interacting wave packets. It is known that in one dimension generally all single-particle states are localized. For weak speckle potentials, we show the existence of a series of sharp cross-overs (effective mobility edges) between regions of the single-particle energy spectrum where the localization lengths differ by orders of magnitude [1].
[1] P. Lugan et al., Phys. Rev. A 80, 023605 (2009).