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Supersolid and solitonic phases in the one-dimensional extended Bose-Hubbard model

Mishra, Tapan and Pai, Ramesh V and Ramanan, S and Luthra, Meetu Sethi and Das, BP (2009) Supersolid and solitonic phases in the one-dimensional extended Bose-Hubbard model. In: Physical Review A, 80 (4). 043614-1-043614-7.

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Abstract

We report our findings on the quantum phase transitions in cold bosonic atoms in a one-dimensional optical lattice using the finite-size density-matrix renormalization-group method in the framework of the extended Bose-Hubbard model. We consider wide ranges of values for the filling factors and the nearest-neighbor interactions. At commensurate fillings, we obtain two different types of charge-density wave phases and a Mott insulator phase. However, departure from commensurate fillings yields the exotic supersolid phase where both the crystalline and the superfluid orders coexist. In addition, we obtain the signatures for the solitary waves and the superfluid phase.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to American Physical Society.
Keywords: bosons; Hubbard model; localised states; optical lattices; quantum solids; renormalisation; solitons
Department/Centre: Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Date Deposited: 02 Dec 2009 05:19
Last Modified: 19 Sep 2010 05:52
URI: http://eprints.iisc.ernet.in/id/eprint/24970

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