2007/11/08 by A. Filinov, J. Böning, Jens Böning +3 · 25 citations
Physics and Astronomy · #Atom (system on chip) #Boundary (topology) #Cold Atom Physics and Bose-Einstein Condensates #Concentric #Condensed matter physics #Core (optical fiber) #Coulomb #Crystal (programming language) #Dust and Plasma Wave Phenomena #Electric field #Electron #Field (mathematics) #Geometry #Materials science #Optics #Physics #Quantum mechanics #Quantum, superfluid, helium dynamics #Superfluidity #cond-mat.stat-mech
paper · pdf · doi:10.1103/physrevb.77.214527
published in Physical Review B 77(21) (American Physical Society)
arxiv created 2007/11/08 · openalex publication_date 2008/06/26 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
When a few identical charged particles are trapped in a spherical electric field at low temperature, they form concentric shells resembling atoms. The behavior of these ``artificial atoms'' is easily controlled by varying the field strength. In particular, it is possible to transfer the system from a liquidlike to a crystal-like state. We analyze artificial atoms consisting of Bose particles and observe superfluid behavior, which even persists in the intermediate radially ordered crystal regime. Furthermore, we demonstrate that the superfluid density can be directed in a controlled way either to the core or to the boundary of the atom.