One-Dimensional Disordered Bosonic Hubbard Model: A Density-Matrix Renormalization Group Study

Pai, Ramesh V and Pandit, Rahul and Krishnamurthy, HR and Ramasesha, S (1996) One-Dimensional Disordered Bosonic Hubbard Model: A Density-Matrix Renormalization Group Study. In: Physical Review Letters, 76 (16). 2937 -2940.

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Abstract

We use the density-matrix renormalization group to study the one-dimensional bosonic Hubbard model, with and without disorder. We obtain the gaps in all phases, certain correlation functions, and the superfluid density. A finite-size-scaling analysis enables us to obtain an accurate phase diagram and the beta function at the superfluid–Mott insulator transition and the Kosterlitz-Thouless essential singularity in the pure case. We also obtain coupling constants used in effective field theories for this system.

Item Type:	Journal Article
Publication:	Physical Review Letters
Publisher:	American Physical Society
Additional Information:	Copyright for this article belongs to American Physical Society (APS)
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	26 Jul 2004
Last Modified:	19 Sep 2010 04:14
URI:	http://eprints.iisc.ac.in/id/eprint/1117

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