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Q: Fachverband Quantenoptik und Photonik
Q 32: Poster: Quantum gases, ultracold atoms and molecules
Q 32.19: Poster
Mittwoch, 19. März 2014, 16:30–18:30, Spree-Palais
Quantum magnetism without lattices in strongly-interacting one-dimensional spinor gases — •Frank Deuretzbacher1, Daniel Becker2, Johannes Bjerlin3, Stephanie Reimann3, and Luis Santos1 — 1Institute for Theoretical Physics, Leibniz University Hanover, Appelstr. 2, DE-30167 Hanover, Germany — 2Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland — 3Mathematical Physics, LTH, Lund University, SE-22100 Lund, Sweden
We show that strongly-interacting multicomponent gases in one dimension can be described by an effective spin model. This constitutes a surprisingly simple scenario for the realization of one-dimensional quantum magnetism in cold gases in the absence of an optical lattice. The spin-chain model allows for an intuitive understanding of recent experiments and for a simple calculation of relevant observables. We analyze the adiabatic preparation of antiferromagnetic and ferromagnetic ground states, and show that many-body spin states may be efficiently probed by means of tunneling experiments. The spin-chain model is valid for more than two components, opening the possibility of realizing SU(N) quantum magnetism in strongly-interacting one-dimensional alkaline-earth or Ytterbium Fermi gases.