Berlin 2014 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 32: Poster: Quantum gases, ultracold atoms and molecules
Q 32.48: Poster
Mittwoch, 19. März 2014, 16:30–18:30, Spree-Palais
Dynamical synthetic gauge fields, string order and correlated phases with periodically modulated interactions — •Sebastian Greschner1, Gaoyong Sun1, Dario Poletti2, and Luis Santos1 — 1Institut für Theoretische Physik, Leibniz Universität Hannover, Appelstr. 2, DE-30167 Hannover, Germany — 2Engineering Product Development, Singapore University of Technology and Design, 20 Dover Drive, 138682 Singapore
A periodic modulation of the magnetic field in the vicinity of a Feshbach resonance induces periodically modulated interactions, which result in a non-linear hopping rate depending on the occupation differences at neighboring sites. We show different scenarios in which dynamical synthetic gauge fields may be engineered using periodically modulated interactions. We analyse in detail the experimental signatures of the created fields and their detection and present simulations of the dynamical preparation of the effective model groundstates. We further discuss how the combined periodic modulation of optical lattices and interactions may be used to realize a very broad class of correlated hopping Hubbard models and study the rich physics of this scenario, including pair-superfluidity, dimerized phases as well as exotic Mott-insulator states with a non-vanishing string-order.