Mean field loops versus quantum anti-crossing nets in trapped Bose-Einstein condensates

Year: 2002

Authors: Karkuszewski Z.P., Sacha K., Smerzi A.

Autors Affiliation: Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA; Jagiellonian Univ, Inst Fizyki, PL-30059 Krakow, Poland; Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.

Abstract: We study a Bose-Einstein condensate trapped in an asymmetric double well potential. Solutions of the time-independent Gross-Pitaevskii equation reveal intrinsic loops in the energy (or chemical potential) level behavior when the shape of the potential is varied. We investigate the corresponding behavior of the quantum (many-body) energy levels. Applying the two-mode approximation to the bosonic field operators, we show that the quantum energy levels create an anti-crossing net inside the region bounded by the loop of the mean field solution.

Journal/Review: EUROPEAN PHYSICAL JOURNAL D

Volume: 21 (3)      Pages from: 251  to: 254

KeyWords: Coherent Oscillations; Double-well; Gas; Interference; Arrays
DOI: 10.1140/epjd/e2002-00229-5

Citations: 24
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