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Dimensional reduction in Bose-Einstein condensed clouds of atoms confined in tight potentials of any geometry and any interaction strength
Örebro University, School of Science and Technology, Örebro University, Sweden. (matematik)ORCID iD: 0000-0002-8730-7392
Örebro University, School of Science and Technology, Örebro University, Sweden. (matematik, Solid State Physics)ORCID iD: 0000-0002-2630-7479
Örebro University, School of Science and Technology, Örebro University, Sweden. (matematik)ORCID iD: 0000-0003-0332-2315
Technological Education Institute of Crete, Heraklion, Greece.
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2017 (English)In: Physical Review E, ISSN 2470-0045Article in journal (Refereed) Accepted
Abstract [en]

Motivated by numerous experiments on Bose-Einstein condensed atoms which have been performed in tight trapping potentials of various geometries (elongated and/or toroidal/annular), we develop a general method which allows us to reduce the corresponding three-dimensional Gross-Pitaevskii equation for the order parameter into an effectively one-dimensional equation, taking into account the interactions (i.e., treating the width of the transverse profile variationally) and the curvature of the trapping potential. As an application of our model we consider atoms which rotate in a toroidal trapping potential. We evaluate the state of lowest energy for a fixed value of the angular momentum within various approximations of the effectively one-dimensional model and compare our results with the full solution of the three-dimensional problem, thus getting evidence for the accuracy of our model.

Place, publisher, year, edition, pages
American Physical Society , 2017.
National Category
Computational Mathematics Condensed Matter Physics
Research subject
Mathematics; Physics
Identifiers
URN: urn:nbn:se:oru:diva-54302OAI: oai:DiVA.org:oru-54302DiVA: diva2:1062594
Available from: 2017-01-07 Created: 2017-01-07 Last updated: 2017-01-16Bibliographically approved

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Sandin, PatrikÖgren, MagnusGulliksson, Mårten
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School of Science and Technology, Örebro University, Sweden
Computational MathematicsCondensed Matter Physics

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