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Article
Sign-alternating interaction mediated by strongly correlated lattice bosons
New Journal of Physics
  • S Söyler, University of Massachusetts - Amherst
  • B Capogrosso-Sansone, University of Massachusetts - Amherst
  • Nikolai Prokof'ev, University of Massachusetts - Amherst
  • Boris Svistunov, University of Massachusetts - Amherst
Publication Date
2009
Abstract

We reveal a generic mechanism of generating sign-alternating intersite interactions mediated by strongly correlated lattice bosons. The ground-state phase diagram of the two-component hard-core Bose–Hubbard model on a square lattice at half-integer filling factor for each component, obtained by worm algorithm Monte Carlo simulations, is strongly modified by these interactions and features the solid+superfluid (SF) phase for strong asymmetry between the hopping amplitudes. The new phase is a direct consequence of the effective nearest-neighbor repulsion between 'heavy' atoms mediated by the 'light' SF component. Due to their sign-alternating character, mediated interactions lead to a rich variety of yet to be discovered quantum phases.

Comments
This is the pre-published version harvested from ArXiv. The published version is located at http://iopscience.iop.org/1367-2630/11/7/073036
Citation Information
S Söyler, B Capogrosso-Sansone, Nikolai Prokof'ev and Boris Svistunov. "Sign-alternating interaction mediated by strongly correlated lattice bosons" New Journal of Physics Vol. 11 (2009)
Available at: http://works.bepress.com/boris_svistunov/33/