Journal
PHYSICS LETTERS A
Volume 382, Issue 6, Pages 394-399Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physleta.2017.12.027
Keywords
Ultra-cold bosons; Double-well trap; Few-body systems
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Funding
- (Polish) National Science Center [2016/22/E/ST2/00555]
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We present a construction of an improved two-mode model for modeling the dynamics of interacting ultra-cold bosons confined in a one-dimensional double well trap. Unlike in the typically used two-mode model based on the lowest single-particle eigenstates of the external potential, the improved model uses a basis of properly chosen effective wave functions originating in the many-body model. Accuracy of the improved model is examined and it is shown that within a certain limit of inter-particle interaction strength, the model recovers an exact evolution of the wells' populations much more closely than the traditional two-mode model. (C) 2017 Elsevier B.V. All rights reserved.
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