The mean-field approximation and the non-linear Schrödinger functional for trapped Bose gases
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- by Mathieu Lewin, Phan Thành Nam and Nicolas Rougerie PDF
- Trans. Amer. Math. Soc. 368 (2016), 6131-6157
Abstract:
We study the ground state of a trapped Bose gas, starting from the full many-body Schrödinger Hamiltonian, and derive the non-linear Schrödinger energy functional in the limit of a large particle number, when the interaction potential converges slowly to a Dirac delta function. Our method is based on quantitative estimates on the discrepancy between the full many-body energy and its mean-field approximation using Hartree states. These are proved using finite dimensional localization and a quantitative version of the quantum de Finetti theorem. Our approach covers the case of attractive interactions in the regime of stability. In particular, our main new result is a derivation of the 2D attractive non-linear Schrödinger ground state.References
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Additional Information
- Mathieu Lewin
- Affiliation: CNRS and Laboratoire de Mathématiques (UMR 8088), Université de Cergy-Pontoise, F-95000 Cergy-Pontoise, France
- Email: mathieu.lewin@math.cnrs.fr
- Phan Thành Nam
- Affiliation: IST Austria, Am Campus 1, 3400 Klosterneuburg, Austria
- MR Author ID: 850145
- Email: pnam@ist.ac.at
- Nicolas Rougerie
- Affiliation: CNRS and Université Grenoble Alpes, LPMMC (UMR 5493), B.P. 166, F-38 042 Grenoble, France
- MR Author ID: 926774
- Email: nicolas.rougerie@grenoble.cnrs.fr
- Received by editor(s): May 18, 2014
- Received by editor(s) in revised form: July 31, 2014
- Published electronically: October 5, 2015
- © Copyright 2015 by the authors
- Journal: Trans. Amer. Math. Soc. 368 (2016), 6131-6157
- MSC (2010): Primary 35Q40
- DOI: https://doi.org/10.1090/tran/6537
- MathSciNet review: 3461029