caa a22 4500 467891621 CHVBK 20180406152751.0 cr unu---uuuuu 170328e20060901xx s 000 0 eng 10.1007/s10955-006-9176-x doi (NATIONALLICENCE)springer-10.1007/s10955-006-9176-x Condensation in a Disordered Infinite-Range Hopping Bose-Hubbard Model [Elektronische Daten] [T. Dorlas, L. Pastur, V. Zagrebnov] We study Bose-Einstein Condensation (BEC) in the Infinite-Range-Hopping Bose-Hubbard model with repulsive on-site particle interaction in the presence of an ergodic random single-site external potential with different distributions. We show that the model is exactly soluble even if the on-site interaction is random. We observe new phenomena: instead of enhancement of BEC for perfect bosons, for constant on-site repulsion and discrete distributions of the single-site potential there is suppression of BEC at certain fractional densities. We show that this suppression appears with increasing disorder. On the other hand, the suppression of BEC at integer densities observed in Bru and Dorlas (J. Stat. Phys. 113:177-195, 2003) in the absence of a random potential, can disappear as the disorder increases. For a continuous distribution we prove that the BEC critical temperature decreases for small on-site repulsion while the BEC is suppressed at integer values of the density for large repulsion. Again, the threshold for this repulsion gets higher, when disorder increases. Springer Science + Business Media, Inc., 2006 Bose-Hubbard model nationallicence Bose condensation nationallicence random potential nationallicence disorder nationallicence Dorlas T. Dublin Institute for Advanced Studies, School of Theoretical Physics, 10 Burlington Road, Dublin 4, Ireland aut Pastur L. Department of Theoretical Physics of Institute for Low Temperature Physics and Engineering, 47 Lenin Avenue, 310164, Kharkov, Ukraine aut Zagrebnov V. Université de la Méditerranée and Centre de Physique Théorique, Luminy-Case 907, 13288, Marseille, Cedex 09, France aut Journal of Statistical Physics Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 124/5(2006-09-01), 1137-1178 0022-4715 124:5<1137 2006 124 10955 https://doi.org/10.1007/s10955-006-9176-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10955-006-9176-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Dorlas T. Dublin Institute for Advanced Studies, School of Theoretical Physics, 10 Burlington Road, Dublin 4, Ireland aut NATIONALLICENCE 700 1- Pastur L. Department of Theoretical Physics of Institute for Low Temperature Physics and Engineering, 47 Lenin Avenue, 310164, Kharkov, Ukraine aut NATIONALLICENCE 700 1- Zagrebnov V. Université de la Méditerranée and Centre de Physique Théorique, Luminy-Case 907, 13288, Marseille, Cedex 09, France aut NATIONALLICENCE 773 0- Journal of Statistical Physics Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 124/5(2006-09-01), 1137-1178 0022-4715 124:5<1137 2006 124 10955 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer