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- University of OsloNO17 papers
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4 papers · 2 filters
Extremal states of positive partial transpose in a system of three qubits
Øyvind Steensgaard Garberg, Børge Irgens, Jan Myrheim
We have studied mixed states in the system of three qubits with the property that all their partial transposes are positive, these are called PPT states. We classify a PPT state by…
Sign of the Casimir-Polder interaction between atoms and oil-water interfaces: Subtle dependence on dielectric properties
Mathias Boström, Simen Å. Ellingsen, Iver Brevik +2
We demonstrate that Casimir-Polder energies between noble gas atoms (dissolved in water) and oil-water interfaces are highly surface specific. Both repulsion (e.g. hexane) and attr…
Ultrathin Metallic Coatings Can Induce Quantum Levitation between Nanosurfaces
Mathias Boström, Barry W. Ninham, Iver Brevik +3
There is an attractive Casimir-Lifshitz force between two silica surfaces in a liquid (bromobenze or toluene). We demonstrate that adding an ultrathin (5-50Å) metallic nanocoating…
Dynamics of genuine multipartite correlations in open quantum systems
Arne L. Grimsmo, Scott Parkins, Bo-Sture K. Skagerstam
We propose a measure for genuine multipartite correlations suited for the study of dynamics in open quantum systems. This measure is contextual in the sense that it depends on how…