title: Condensate fragmentation in a new exactly solvable model for confined bosons.
abstract: Based on Richardson's exact solution of the multilevel pairing model we derive a new class of exactly solvable models for the finite boson system. As an example we solve a particular Hamiltonian which displays a transition to a fragmented condensate for repulsive pairing interaction.
authors.affiliation: Instituto de Estructura de la Materia, C.S.I.C., Madrid, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Dukelsky
authors.forename: P
authors.initials: P
authors.lastname: Schuck