caa a22 4500 445366451 CHVBK 20180317142932.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s10909-011-0392-7 doi (NATIONALLICENCE)springer-10.1007/s10909-011-0392-7 Spin Effects in Bose-Glass Phases [Elektronische Daten] [S. Paganelli, M. Ła̧cki, V. Ahufinger, J. Zakrzewski, A. Sanpera] We study the mechanism of formation of Bose glass (BG) phases in the spin-1 Bose Hubbard model when diagonal disorder is introduced. To this aim, we analyze first the phase diagram in the zero-hopping limit, there disorder induces superposition between Mott insulator (MI) phases with different filling numbers. Then BG appears as a compressible insulating phase (its compressibility marking the distinction with respect to a more common Mott insulator). The phase diagram for finite hopping is also calculated with the Gutzwiller approximation. The bosons' spin degrees of freedom introduce another scattering channel in the two-body interaction modifying the stability of MI regions with respect to the action of disorder. This leads to some peculiar phenomena such as the creation of BG of singlets, for very strong spin correlation, or the disappearance of BG phase in some particular cases where fluctuations are not able to mix different MI regions. Springer Science+Business Media, LLC, 2011 Ultracold atoms nationallicence Bose glass nationallicence Spin-1 Bose Hubbard model nationallicence Paganelli S. Grup de Física Teòrica: Informació i Fenòmens Quàntics, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain aut Ła̧cki M. Instytut Fizyki imienia Mariana Smoluchowskiego, Uniwersytet Jagielloński, ulica Reymonta 4, 30-059, Kraków, Poland aut Ahufinger V. Grup d'Òptica: Departament de Física, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain aut Zakrzewski J. Instytut Fizyki imienia Mariana Smoluchowskiego, Uniwersytet Jagielloński, ulica Reymonta 4, 30-059, Kraków, Poland aut Sanpera A. Grup de Física Teòrica: Informació i Fenòmens Quàntics, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain aut Journal of Low Temperature Physics Springer US; http://www.springer-ny.com 165/5-6(2011-12-01), 227-238 0022-2291 165:5-6<227 2011 165 10909 https://doi.org/10.1007/s10909-011-0392-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10909-011-0392-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Paganelli S. Grup de Física Teòrica: Informació i Fenòmens Quàntics, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain aut NATIONALLICENCE 700 1- Ła̧cki M. Instytut Fizyki imienia Mariana Smoluchowskiego, Uniwersytet Jagielloński, ulica Reymonta 4, 30-059, Kraków, Poland aut NATIONALLICENCE 700 1- Ahufinger V. Grup d'Òptica: Departament de Física, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain aut NATIONALLICENCE 700 1- Zakrzewski J. Instytut Fizyki imienia Mariana Smoluchowskiego, Uniwersytet Jagielloński, ulica Reymonta 4, 30-059, Kraków, Poland aut NATIONALLICENCE 700 1- Sanpera A. Grup de Física Teòrica: Informació i Fenòmens Quàntics, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain aut NATIONALLICENCE 773 0- Journal of Low Temperature Physics Springer US; http://www.springer-ny.com 165/5-6(2011-12-01), 227-238 0022-2291 165:5-6<227 2011 165 10909 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer