Volume 67, Number 1, July 2004
|Page(s)||8 - 13|
|Published online||01 June 2004|
Continuous configuration-interaction for condensates in a ring
Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg Im Neuenheimer Feld 229, D-69120 Heidelberg, Germany
Corresponding author: firstname.lastname@example.org
Accepted: 3 May 2004
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.
PACS: 03.75.Hh – Static properties of condensates; thermodynamical, statistical and structural properties / 05.30.Jp – Boson systems
© EDP Sciences, 2004
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