Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 36: Quantum Gases: Bosons IV
Q 36.2: Vortrag
Mittwoch, 2. März 2016, 14:45–15:00, e001
Many body localization of bosons in a two dimensional square lattice — •Jae-yoon Choi1, Sebastian Hild1, Johannes Zeiher1, Antonio Rubio Abadal1, Immanuel Bloch1,2, and Christian Groß1 — 1Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany — 2Fakultät für Physik, Ludwig-Maximilians-Universität München, Schellingstraße 4, 80799 München, Germany
Under which conditions well isolated quantum systems do thermalize is a fundamental question. Many-body localization (MBL) marks a general class of systems which do not thermalize. Microscopic detection of diverging observables near the phase transition remains experimentally challenging, and demonstration of the MBL in higher dimensions is still demanding. We report on recent experiments on many body localization of Bosons in a two dimensional square lattice geometry. We prepare a structured highly excited Mott insulating state which relaxes to a thermal state for vanishing disorder. A projected on-site random disorder potential changes the time evolution significantly and leads to localization. Local observables down to the single atom and single lattice site are used to quantify the temporal changes of the bosonic many body state for different disorder strength.