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5 papers · 2 filters
Diagnosing a two-body state of ultracold atoms with light
Rafał Ołdziejewski, Kazimierz Rzążewski
An absorption of a weak pulse by two identical atoms moving in a trap is investigated. Based on atom-light interactions we present a microscopic model of a two-body wave function d…
Unified description of dynamics of a repulsive two-component Fermi gas
Piotr T. Grochowski, Tomasz Karpiuk, Mirosław Brewczyk +1
We study a binary spin-mixture of a zero-temperature repulsively interacting Li atoms using both the atomic-orbital and the density functional approaches. The gas is initially…
Metrologically useful states of spin-1 Bose condensates with macroscopic magnetization
Dariusz Kajtoch, Krzysztof Pawłowski, Emilia Witkowska
We study theoretically the usefulness of spin-1 Bose condensates with macroscopic magnetization in a homogeneous magnetic field for quantum metrology. We demonstrate Heisenberg sca…
Mesoscopic quantum superpositions in bimodal Bose-Einstein condensates: decoherence and strategies to counteract it
Krzysztof Pawlowski, Matteo Fadel, Philipp Treutlein +2
We study theoretically the interaction-induced generation of mesoscopic coherent spin state superpositions (small cat states) from an initial coherent spin state in bimodal Bose-Ei…
Electric dipoles vs. magnetic dipoles - for two molecules in a harmonic trap
Wojciech Górecki, Kazimierz Rzążewski
We study energy levels of two heteronuclear molecules moving in a spherically symmetric harmonic trap. A role of electric dipole interactions is compared and contrasted with our ea…