Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2004-10-23
Phys.Rev.Lett. 93 (2004) 230405
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Published version. Typos corrected. REVTEX4; 5 pages with 3 PS figures. For related papers, see http://www.prism.gatech.edu/~p
Scientific paper
10.1103/PhysRevLett.93.230405
Strongly repelling bosons in two-dimensional harmonic traps are described through breaking of rotational symmetry at the Hartree-Fock level and subsequent symmetry restoration via projection techniques, thus incorporating correlations beyond the Gross-Pitaevskii (GP) solution. The bosons localize and form polygonal-ring-like crystalline patterns, both for a repulsive contact potential and a Coulomb interaction, as revealed via conditional-probability-distribution analysis. For neutral bosons, the total energy of the crystalline phase saturates in contrast to the GP solution, and its spatial extent becomes smaller than that of the GP condensate. For charged bosons, the total energy and dimensions approach the values of classical point-like charges in their equilibrium configuration.
Landman Uzi
Romanovsky Igor
Yannouleas Constantine
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