Berlin 2014 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 34: Poster: Ultra-cold atoms, ions and BEC (with Q)

A 34.10: Poster

Mittwoch, 19. März 2014, 16:30–18:30, Spree-Palais

Exotic Quantum Magnetism with cold atoms — •Marie Piraud, Zi Cai, and Ulrich Schollwoeck — Department für Physik, LMU München, Theresienstrasse 37, 80333 München

Strongly interacting ultra-cold atoms in artificial gauge fields can lead to many interesting effects. In the Mott regime for example, effective spin-Hamiltonians can be derived and various magnetic phases appear. In particular, a Dzyaloshinskii-Moriya (DM) Interaction term -- which is relevant in the Condensed Matter context -- is typically obtained for fermionic or two-component bosonic gases with spin-orbit coupling. We study the spin-Hamiltonians that are obtained in this context using large-scale DMRG simulations in one and two dimensions. The interplay between the exchange and DM interactions lead to ferromagnetic, antiferromagnetic and spiral ordered phases.