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A: Fachverband Atomphysik
A 6: Cold atoms III - optical lattices (joint session A/Q)
A 6.2: Vortrag
Montag, 5. März 2018, 14:15–14:30, K 0.011
Chimera patterns in conservative systems and ultracold atoms with mediated nonlocal hopping — •Hon-Wai Lau1,2,3, Jörn Davidsen3, and Christoph Simon2 — 1Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Straße 38, D-01187 Dresden — 2Institute for Quantum Science and Technology and Department of Physics and Astronomy, University of Calgary, Calgary, Alberta, Canada T2N 1N4 — 3Complexity Science Group, Department of Physics and Astronomy, University of Calgary, Canada T2N 1N4
Chimera patterns, characterized by coexisting regions of phase coherence and incoherence, have been experimentally demonstrated in mechanical, chemical, electronic, and opto-electronic systems. The patterns have so far been studied in non-conservative systems with dissipation. Here, we show that the formation of chimera patterns can also be observed in conservative Hamiltonian systems with nonlocal hopping in which both energy and particle number are conserved. We further show the physical mechanism and the implementation in ultracold atomic systems: Nonlocal spatial hopping over up to tens of lattice sites with independently tunable hopping strength and on-site nonlinearity can be implemented in a two-component Bose-Einstein condensate with a spin-dependent optical lattice, where the untrapped component serves as the matter-wave mediating field. The present work highlights the connections between chimera patterns, nonlinear dynamics, condensed matter, and ultracold atoms.