Continuous configuration-interaction for condensates in a ring

O. E. Alon, A. I. Streltsov, K. Sakmann, L. S. Cederbaum

Research output: Contribution to journalArticlepeer-review


A continuous configuration-interaction approach for condensates in a ring is introduced. In its simplest form this approach utilizes for attractive condensates the Gross-Pitaevskii symmetry-broken solution and arrives at a ground state of correct symmetry. Furthermore, the energy found is lower than the Gross-Pitaevskii one and, with increasing number of particles and/or strength of inter-particle interaction, is even lower than that accessed by tractable diagonalization of the many-body Hamiltonian. Implications also to excited states are briefly discussed.

Original languageEnglish
Pages (from-to)8-13
Number of pages6
JournalEurophysics Letters
Issue number1
StatePublished - 1 Jul 2004
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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