Heidelberg 2015 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 62: Poster: Quantum Optics and Photonics III

Q 62.29: Poster

Donnerstag, 26. März 2015, 17:00–19:00, C/Foyer

Dynamical localization in a quantum André-Aubry potential — •Katharina Rojan¹, Hessam Habibian^2,3, Anna Minguzzi⁴, and Giovanna Morigi¹ — ¹Theoretische Physik, Universität des Saarlandes, D-66123 Saarbrücken, Germany — ²Departament de Física, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain — ³Institut de Ciéncies Fotóniques (ICFO), Mediterranean Technology Park, E-08860 Castelldefels (Barcelona), Spain — ⁴Laboratoire de Physique et Modélisation des Milieux Condensés, C.N.R.S, B.P. 166, 38042 Grenoble, France

We study the dynamics of a single cold atom tightly confined in an optical lattice, whose dipolar transition strongly couples with a second sinusoidal potential at a different wavelength than the confining lattice. When the second lattice is originated by the coupling with a standing-wave cavity, then its form depends nonlinearly on the atomic wave function. We determine the ground state of the atom by solving self-consistently the corresponding master equation. We identify the conditions under which phenomena occur that are analogous to localization in the André-Aubry model, and discuss the features which are exquisitely due to the quantum nature of the cavity potential.