Slave Boson Formulation for Interacting Boson Systems and the Superfluid - Insulator Transition
نویسنده
چکیده
A new formulation for the study of interacting bosons on a lattice is introduced. This approach is used to give analytical expressions for the Mott insulating lobes in the phase diagram and to calculate the density-density correlation function. It is also shown that, at mean-field level, this newly introduced slave boson theory coincides with mean-field theory of a suitably introduced order parameter. PACS numbers: 05.30, 71.30.+h, 67.40.-w Typeset using REVTEX 1
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