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- Max Planck SocietyDE48 papers
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14 papers · 1 filter
Quantum dynamics of Bose-Einstein condensates in tilted and driven bichromatic optical lattices
D. Witthaut, F. Trimborn, V. Kegel +1
We study the dynamics of Bose-Einstein condensates in tilted and driven optical superlattices. For a bichromatic lattice, each Bloch band split up into two minibands such that the…
Quantum walks and quantum simulations with Bloch oscillating spinor atoms
D. Witthaut
We propose a scheme for the realization of a quantum walker and a quantum simulator for the Dirac equation with ultracold spinor atoms in driven optical lattices. A precise control…
Rods of Neutron Scattering Intensity in Yb2Ti2O7: Compelling Evidence for Significant Anisotropic Exchange in a Magnetic Pyrochlore Oxide
Jordan D. Thompson, Paul A. McClarty, Henrik M. Ronnow +3
Paramagnetic correlations in the magnetic material Yb2Ti2O7 have been investigated via neutron scattering, revealing a [111] rod of scattering intensity. Assuming interactions betw…
Nonlinear Landau-Zener tunneling in quantum phase space
F. Trimborn, D. Witthaut, V. Kegel +1
We present a detailed analysis of the Landau-Zener problem for an interacting Bose-Einstein condensate in a time-varying double-well trap, especially focussing on the relation betw…
Orientational order and glassy states in networks of semiflexible polymers
Martin Kiemes, Panayotis Benetatos, Annette Zippelius
Motivated by the structure of networks of cross-linked cytoskeletal biopolymers, we study the orientationally ordered phases in two-dimensional networks of randomly cross-linked se…
Bilayer membranes in micro-fluidics: from gel emulsions to soft functional devices
Shashi Thutupalli, Stephan Herminghaus, Ralf Seemann
We outline a concept of self-assembled soft matter devices based on micro-fluidics, which use surfactant bilayer membranes as their main building blocks, arrested in geometric stru…