Sign-alternating interaction mediated by strongly correlated lattice bosons

Authors

S Söyler, University of Massachusetts - Amherst
B Capogrosso-Sansone, University of Massachusetts - Amherst
Nikolai Prokof'ev, University of Massachusetts - AmherstFollow
Boris Svistunov, University of Massachusetts - AmherstFollow

Publication Date

2009

Journal or Book Title

New Journal of Physics

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

Volume

11

Recommended Citation

Söyler, S; Capogrosso-Sansone, B; Prokof'ev, Nikolai; and Svistunov, Boris, "Sign-alternating interaction mediated by strongly correlated lattice bosons" (2009). New Journal of Physics. 1163.
Retrieved from https://scholarworks.umass.edu/physics_faculty_pubs/1163