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One-dimensional extended Bose-Hubbard model with a confining potential: a DMRG analysis
KTH, School of Engineering Sciences (SCI), Theoretical Physics, Condensed Matter Theory.ORCID iD: 0000-0002-2076-5911
2006 (English)In: Journal of Physics B: Atomic, Molecular and Optical Physics, ISSN 0953-4075, E-ISSN 1361-6455, Vol. 39, no 24, 5187-5198 p.Article in journal (Refereed) Published
Abstract [en]

The extended Bose-Hubbard model in a quadratic trap potential is studied using a finite-size density-matrix renormalization group method (DMRG). We compute the boson density profiles, the local compressibility and the hopping correlation functions. We observe the phase separation induced by the trap in all the quantities studied and conclude that the local density approximation is valid in the extended Bose-Hubbard model. From the plateaus obtained in the local compressibility it was possible to obtain the phase diagram of the homogeneous system which is in agreement with previous results.

Place, publisher, year, edition, pages
2006. Vol. 39, no 24, 5187-5198 p.
Keyword [en]
quantum renormalization-groups, josephson-junction arrays, localization, transition, vortices
URN: urn:nbn:se:kth:diva-16205ISI: 000242809900015ScopusID: 2-s2.0-33846065957OAI: diva2:334247
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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