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14 papers · 2 filters
Density-induced geometric frustration of ultra-cold bosons in optical lattices
Tapan Mishra, Sebastian Greschner, Luis Santos
A density-dependent gauge field may induce density-induced geometric frustration, leading to a non-trivial interplay between density modulation and frustration, which we illustrate…
Topological phases of lattice bosons with a dynamical gauge field
David Raventós, Tobias Graß, Bruno Juliá-Díaz +2
Optical lattices with a complex-valued tunnelling term have become a standard way of studying gauge-field physics with cold atoms. If the complex phase of the tunnelling is made de…
Equation of state and Kosterlitz-Thouless transition temperature in two-dimensional Fermi gases: An analytical approach
Michael Klawunn
We study Fermi gases in two dimensions at low temperatures with attractive interactions. Analytical results are derived for the equation of state and the Kosterlitz-Thouless transi…
Dynamics of quantized vortices in Bose-Einstein condensates with laser-induced spin-orbit coupling
Kenichi Kasamatsu
We study vortex dynamics in trapped two-component Bose-Einstein condensates with a laser- induced spin-orbit coupling using the numerical analysis of the Gross-Pitaevskii equation.…
Frustration-induced supersolids in the absence of inter-site interactions
Tapan Mishra, Sebastian Greschner, Luis Santos
We discuss a mechanism for the realization of supersolids in lattices in the absence of intersite interactions that surprisingly works as well at unit filling. This mechanism, that…
Antiferromagnetic Heisenberg Spin Chain of a Few Cold Atoms in a One-Dimensional Trap
Simon Murmann, Frank Deuretzbacher, Gerhard Zürn +5
We report on the deterministic preparation of antiferromagnetic Heisenberg spin chains consisting of up to four fermionic atoms in a one-dimensional trap. These chains are stabiliz…