Phys. Rev. B 76, 075117 (2007) [5 pages]Low-energy effective theory for one-dimensional lattice bosons near integer fillingReceived 1 March 2007; revised 25 July 2007; published 15 August 2007 A low-energy effective theory for interacting bosons on a one-dimensional lattice at and near integer fillings is proposed. It is found that two sets of bosonic phase fields are necessary in order to explain the complete phase diagram. Using the present effective theory, the nature of the quantum phase transitions among various phases can be identified. Moreover, the general condition for the appearance of the recently proposed Pfaffian-like state can be realized from our effective action. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.76.075117
DOI:
10.1103/PhysRevB.76.075117
PACS:
05.30.Jp
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