Low-energy theory for the Bose-Hubbard model and the normal ground state of bosons

Authors
Herbut, IF
Citation
If. Herbut, Low-energy theory for the Bose-Hubbard model and the normal ground state of bosons, PHYS REV B, 60(21), 1999, pp. 14503-14506
Citations number
19
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B-CONDENSED MATTER
ISSN journal
01631829 → ACNP
Volume
60
Issue
21
Year of publication
1999
Pages
14503 - 14506
Database
ISI
SICI code
0163-1829(199912)60:21<14503:LTFTBM>2.0.ZU;2-M
Abstract
A bosonic realization of the SU(2) algebra and of its vector representation is constructed, and an effective low-energy description of the Bose-Hubbar d model in the form of anisotropic theory of quantum rotors is proposed and discussed. A possibility of a normal zero-temperature bosonic phase with n either crystalline nor superfluid order around the tip of the checkerboard- solid lobe at half-integer fillings is suggested. [S0163-1829(99)01745-2].