Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/101700
Title: | Robustness of discrete semifluxons in closed Bose-Hubbard chains |
Author: | Gallemí Camacho, Albert Guilleumas, Montserrat Martorell Domenech, Juan Mayol Sánchez, Ricardo Polls Martí, Artur Juliá-Díaz, Bruno |
Keywords: | Teoria quàntica Control de robustesa Bosons Quantum theory Robust control Bosons |
Issue Date: | 6-Jul-2016 |
Publisher: | IOP Publishing |
Abstract: | We present the properties of the ground state and low-energy excitations of Bose-Hubbard chains with a geometry that varies from open to closed and with a tunable twisted link. In the vicinity of the symmetric π-flux case the system behaves as an interacting gas of discrete semifluxons for finite chains and interactions in the Josephson regime. The energy spectrum of the system is studied by direct diagonalization and by solving the corresponding Bogoliubov-de Gennes equations. The atom-atom interactions are found to enhance the presence of strongly correlated macroscopic superpositions of semifluxons. |
Note: | Reproducció del document publicat a: http://dx.doi.org/10.1088/1367-2630/18/7/075005 |
It is part of: | New Journal of Physics, 2016, vol. 18, num. 7, p. 075005 |
URI: | http://hdl.handle.net/2445/101700 |
Related resource: | http://dx.doi.org/10.1088/1367-2630/18/7/075005 |
ISSN: | 1367-2630 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) |
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663198.pdf | 2.12 MB | Adobe PDF | View/Open |
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