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- Ruhr University BochumDE17 papers
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6 papers · 1 filter
Rotating states for trapped bosons in an optical lattice
Emil Lundh
Rotational states for trapped bosons in an optical lattice are studied in the framework of the Hubbard model. Critical frequencies are calculated and the main parameter regimes are…
One-dimensional phase transitions in a two-dimensional optical lattice
Magnus Rehn, Sara Bergkvist, Anders Rosengren +4
A phase transition for bosonic atoms in a two-dimensional anisotropic optical lattice is considered. If the tunnelling rates in two directions are different, the system can undergo…
New Quantum Limits in Plasmonic Devices
M. Marklund, G. Brodin, L. Stenflo +1
Surface plasmon polaritons (SPPs) have recently been recognized as an important future technique for microelectronics. Such SPPs have been studied using classical theory. However,…
Mott transition in anharmonic confinement
Emil Lundh
Two effects are identified that affect the visibility of the Mott transition in an atomic gas in an optical lattice confined in a power-law potential. The transition can be made mo…
Anomalous reflection and excitation of surface waves in metamaterials
G. Brodin, M. Marklund, L. Stenflo +1
We consider reflection of electromagnetic waves from layered structures with various dielectric and magnetic properties, including metamaterials. Assuming periodic variations in th…
Construction of a giant vortex state in a trapped Fermi system
Emil Lundh
A superfluid atomic Fermi system may support a giant vortex if the trapping potential is anharmonic. In such a potential, the single-particle spectrum has a positive curvature as a…