Heidelberg 2015 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 18: Poster: Ultra-cold atoms, ions and BEC (with Q)

A 18.34: Poster

Dienstag, 24. März 2015, 17:00–19:00, C/Foyer

Linear to zigzag transition in dipolar chains — •Florian Cartarius^1,2,3, Anna Minguzzi^2,3, and Giovanna Morigi¹ — ¹Theoretische Physik, Universität des Saarlandes, 66123 Saarbrücken, Germany — ²Laboratoire de Physique et Modélisation des Milieux Condensés, Université Grenoble Alpes, F-38000 Grenoble, France — ³Laboratoire de Physique et Modélisation des Milieux Condensés, CNRS, F-38000 Grenoble, France

In very anisotropic confinement cold dipolar particles can arrange in linear chains. By relaxing the transverse confinement these chains split into a zigzag structure. We consider a chain of dipolar bosons superimposed by an optical lattice, where the particles can tunnel from one site to the next. In deep optical lattices the coupling to the axial phonons can be neglected and it is possible to describe the behaviour of the system by two coupled extended Bose-Hubbard Hamiltonians close to the transition [1]. We present the solution of this model using a path integral Monte Carlo method.

[1] Pietro Silvi, Tommaso Calarco, Giovanna Morigi, Simone Montangero, Phys. Rev. B 89, 094103 (2014)